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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:34:00,702 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:34:00,704 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:34:00,715 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:34:00,716 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:34:00,717 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:34:00,718 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:34:00,720 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:34:00,722 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:34:00,723 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:34:00,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:34:00,757 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 [2018-09-30 10:34:00,781 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:34:00,783 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:34:00,784 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:34:00,784 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:34:00,785 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:34:00,785 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:34:00,785 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:34:00,785 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:34:00,785 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:34:00,786 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:34:00,786 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:34:00,786 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:34:00,786 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:34:00,786 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:34:00,787 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:34:00,787 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:34:00,787 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:34:00,787 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:34:00,788 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:34:00,788 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:34:00,789 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:34:00,789 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:34:00,789 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:34:00,789 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:34:00,789 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:34:00,790 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:34:00,790 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:34:00,790 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:34:00,790 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:34:00,790 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:34:00,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:34:00,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:34:00,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:34:00,861 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:34:00,862 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:34:00,862 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-30 10:34:00,863 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-30 10:34:00,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:34:00,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:34:00,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:34:00,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:34:00,911 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:34:00,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,949 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:34:00,949 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:34:00,949 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:34:00,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:34:00,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:34:00,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:34:00,952 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:34:00,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... [2018-09-30 10:34:00,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:34:00,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:34:00,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:34:00,974 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:34:00,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:34:01,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:34:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:34:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:34:01,240 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:34:01,241 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:34:01 BoogieIcfgContainer [2018-09-30 10:34:01,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:34:01,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:34:01,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:34:01,247 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:34:01,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:34:00" (1/2) ... [2018-09-30 10:34:01,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3bb658 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:34:01, skipping insertion in model container [2018-09-30 10:34:01,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:34:01" (2/2) ... [2018-09-30 10:34:01,256 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-30 10:34:01,267 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:34:01,275 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:34:01,334 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:34:01,335 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:34:01,335 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:34:01,335 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:34:01,336 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:34:01,336 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:34:01,336 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:34:01,336 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:34:01,336 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:34:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:34:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:34:01,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,363 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:34:01,364 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 10:34:01,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:01,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,553 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:34:01,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:34:01,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:34:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:34:01,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:34:01,574 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:34:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,637 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:34:01,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:34:01,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:34:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,650 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:34:01,651 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:34:01,655 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 [2018-09-30 10:34:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:34:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:34:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:34:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:34:01,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 10:34:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,697 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:34:01,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:34:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:34:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:34:01,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,698 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:34:01,699 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 10:34:01,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:01,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:01,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 10:34:02,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:34:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:34:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:34:02,251 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 10:34:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,389 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:34:02,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:34:02,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 10:34:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,390 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:34:02,390 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:34:02,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:34:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:34:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:34:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:34:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:34:02,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 10:34:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,395 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:34:02,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:34:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:34:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:34:02,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,396 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 10:34:02,397 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 10:34:02,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:02,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:02,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:02,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:02,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:02,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:02,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 10:34:02,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:34:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:34:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:34:02,784 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 10:34:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,903 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:34:02,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:34:02,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 10:34:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,904 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:34:02,905 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:34:02,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:34:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:34:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:34:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:34:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:34:02,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 10:34:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,911 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:34:02,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:34:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:34:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:34:02,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,912 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 10:34:02,913 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 10:34:02,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:02,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:03,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:03,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:03,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:34:03,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:03,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:03,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:34:03,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:03,481 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 10:34:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:03,542 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:34:03,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:34:03,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 10:34:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:03,545 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:34:03,545 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:34:03,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:34:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:34:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:34:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:34:03,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 10:34:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:03,550 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:34:03,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:34:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:34:03,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:03,551 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 10:34:03,551 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:03,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 10:34:03,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:03,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:03,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:03,763 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:03,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:03,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:03,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 10:34:03,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:34:03,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:34:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:34:03,931 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 10:34:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:03,999 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:34:04,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:34:04,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 10:34:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,001 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:34:04,002 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:34:04,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:34:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:34:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:34:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:34:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:34:04,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 10:34:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,007 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:34:04,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:34:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:34:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:34:04,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,008 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 10:34:04,009 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 10:34:04,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:04,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:04,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:04,475 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:34:04,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:04,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:34:04,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:34:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:34:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:34:04,667 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 10:34:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:04,756 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:34:04,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:34:04,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:34:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,757 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:34:04,758 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:34:04,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:34:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:34:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:34:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:34:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:34:04,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 10:34:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,763 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:34:04,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:34:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:34:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:34:04,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,764 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 10:34:04,764 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 10:34:04,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:04,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:04,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:04,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:34:04,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 10:34:05,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:34:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:34:05,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:34:05,189 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 10:34:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:05,255 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:34:05,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:34:05,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 10:34:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:05,256 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:34:05,257 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:34:05,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:34:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:34:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:34:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:34:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:34:05,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 10:34:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:05,263 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:34:05,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:34:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:34:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:05,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:05,264 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 10:34:05,264 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:05,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 10:34:05,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:05,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:05,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:05,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:05,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:05,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 10:34:05,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:34:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:34:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:34:05,773 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 10:34:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:05,846 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:34:05,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:05,847 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 10:34:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:05,848 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:34:05,848 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:34:05,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:34:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:34:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:34:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:34:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:34:05,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 10:34:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:05,854 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:34:05,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:34:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:34:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:34:05,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:05,855 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 10:34:05,855 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:05,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 10:34:05,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:05,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:05,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:05,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:05,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:05,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:05,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:05,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 10:34:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:34:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:34:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:34:06,231 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 10:34:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,325 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:34:06,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:34:06,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 10:34:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,327 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:34:06,327 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:34:06,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:34:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:34:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:34:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:34:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:34:06,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 10:34:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,332 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:34:06,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:34:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:34:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:34:06,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,333 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 10:34:06,333 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 10:34:06,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:06,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:06,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:06,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:34:06,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 10:34:06,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:34:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:34:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:34:06,816 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 10:34:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:07,110 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:34:07,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:34:07,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 10:34:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:07,112 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:34:07,112 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:34:07,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:34:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:34:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:34:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:34:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:34:07,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 10:34:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:07,118 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:34:07,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:34:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:34:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:34:07,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:07,119 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 10:34:07,119 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:07,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:07,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 10:34:07,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:07,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:07,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:07,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:07,379 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:07,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:07,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:07,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 10:34:07,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:34:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:34:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:34:07,634 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 10:34:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:07,982 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:34:07,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:34:07,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 10:34:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:07,983 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:34:07,984 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:34:07,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:34:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:34:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:34:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:34:07,990 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 10:34:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:07,990 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:34:07,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:34:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:34:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:34:07,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:07,992 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 10:34:07,992 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:07,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 10:34:07,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:07,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:07,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:07,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:08,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:08,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:08,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:34:08,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:08,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:08,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 10:34:08,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:34:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:34:08,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:34:08,678 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 10:34:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:08,776 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:34:08,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:34:08,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 10:34:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:08,777 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:34:08,778 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:34:08,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:34:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:34:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:34:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:34:08,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 10:34:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:08,785 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:34:08,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:34:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:34:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:34:08,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:08,786 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 10:34:08,786 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:08,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 10:34:08,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:08,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:08,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:08,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:09,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:09,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:34:09,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:09,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:09,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 10:34:09,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:34:09,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:34:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:34:09,417 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 10:34:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:09,490 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:34:09,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:34:09,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 10:34:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:09,492 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:34:09,492 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:34:09,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:34:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:34:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:34:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:34:09,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 10:34:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:09,498 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:34:09,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:34:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:34:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:34:09,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:09,499 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 10:34:09,499 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:09,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 10:34:09,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:09,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:09,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:09,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:09,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:10,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 10:34:10,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:34:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:34:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:34:10,034 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 10:34:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,137 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:34:10,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:34:10,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 10:34:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,138 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:34:10,138 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:34:10,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:34:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:34:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:34:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:34:10,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 10:34:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:10,144 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:34:10,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:34:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:34:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:34:10,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:10,146 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 10:34:10,146 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:10,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:10,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 10:34:10,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:10,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:10,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:10,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:10,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:10,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:10,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:10,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:10,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:10,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 10:34:10,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:34:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:34:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:34:10,821 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 10:34:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,959 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:34:10,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:34:10,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 10:34:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,960 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:34:10,960 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:34:10,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:34:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:34:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:34:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:34:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:34:10,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 10:34:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:10,967 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:34:10,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:34:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:34:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:34:10,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:10,968 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 10:34:10,968 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:10,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 10:34:10,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:10,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:10,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:10,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:11,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:11,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:11,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:34:11,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:11,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:11,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 10:34:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:34:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:34:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:34:11,837 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 10:34:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:11,957 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:34:11,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:34:11,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 10:34:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:11,959 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:11,959 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:34:11,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:34:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:34:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:34:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:34:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:34:11,965 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 10:34:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:11,966 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:34:11,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:34:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:34:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:34:11,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:11,967 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 10:34:11,967 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:11,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 10:34:11,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:11,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:11,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:11,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:12,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:12,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:12,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:12,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:12,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 10:34:12,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:34:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:34:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:34:12,520 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 10:34:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:12,594 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:34:12,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:34:12,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 10:34:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:12,595 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:34:12,595 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:34:12,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:34:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:34:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:34:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:34:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:34:12,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 10:34:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:12,602 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:34:12,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:34:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:34:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:34:12,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:12,603 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 10:34:12,603 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:12,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 10:34:12,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:12,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:12,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:12,982 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:34:12,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:12,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:13,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 10:34:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:34:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:34:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:34:13,446 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 10:34:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:13,683 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:34:13,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:34:13,684 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 10:34:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:13,685 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:13,685 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:34:13,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:34:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:34:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:34:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:34:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:34:13,692 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 10:34:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:13,692 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:34:13,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:34:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:34:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:34:13,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:13,693 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 10:34:13,694 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:13,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 10:34:13,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:13,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:13,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:13,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:14,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:14,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:14,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:34:14,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:14,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:14,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 10:34:14,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:34:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:34:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:34:14,695 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 10:34:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,781 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:34:14,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:34:14,782 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 10:34:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,783 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:14,783 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:34:14,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:34:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:34:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:34:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:34:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:34:14,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 10:34:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,788 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:34:14,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:34:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:34:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:34:14,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,789 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 10:34:14,789 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 10:34:14,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:15,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:15,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 10:34:15,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:34:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:34:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:34:15,851 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 10:34:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,019 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:34:16,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:34:16,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 10:34:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,020 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:16,021 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:34:16,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:34:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:34:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:34:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:34:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:34:16,027 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 10:34:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,027 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:34:16,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:34:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:34:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:34:16,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,028 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 10:34:16,029 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 10:34:16,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:16,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:16,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:16,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:16,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:16,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:16,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:17,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 10:34:17,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:34:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:34:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:34:17,066 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 10:34:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:17,166 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:34:17,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:34:17,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 10:34:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:17,167 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:17,168 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:34:17,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:34:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:34:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:34:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:34:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:34:17,175 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 10:34:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:17,175 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:34:17,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:34:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:34:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:34:17,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:17,176 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 10:34:17,176 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:17,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 10:34:17,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:17,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:17,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:17,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:17,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:17,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:34:17,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:17,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:18,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 10:34:18,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:34:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:34:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:34:18,199 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 10:34:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:18,332 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:34:18,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:34:18,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 10:34:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:18,336 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:18,336 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:34:18,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:34:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:34:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:34:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:34:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:34:18,342 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 10:34:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:18,342 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:34:18,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:34:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:34:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:34:18,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:18,344 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 10:34:18,344 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:18,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 10:34:18,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:18,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:19,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:19,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:19,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:19,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:19,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:19,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 10:34:19,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:34:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:34:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:34:19,776 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 10:34:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,878 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:34:19,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:34:19,879 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 10:34:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,880 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:19,880 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:34:19,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:34:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:34:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:34:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:34:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:34:19,886 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 10:34:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:19,886 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:34:19,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:34:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:34:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:34:19,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:19,887 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 10:34:19,887 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:19,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 10:34:19,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:19,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:19,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:19,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:20,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:20,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:20,304 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:20,334 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:34:20,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:20,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:21,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 10:34:21,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:34:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:34:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:34:21,024 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 10:34:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:21,150 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:34:21,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:34:21,150 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 10:34:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:21,151 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:21,151 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:34:21,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:34:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:34:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:34:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:34:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:34:21,157 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 10:34:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:21,157 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:34:21,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:34:21,157 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:34:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:34:21,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:21,158 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 10:34:21,158 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:21,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:21,159 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 10:34:21,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:21,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:21,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:21,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:21,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:21,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:21,636 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:34:21,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:21,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:22,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 10:34:22,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:34:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:34:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:34:22,091 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 10:34:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:22,248 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:34:22,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:34:22,249 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 10:34:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:22,249 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:22,250 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:34:22,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:34:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:34:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:34:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:34:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:34:22,255 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 10:34:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:22,255 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:34:22,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:34:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:34:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:34:22,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:22,256 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 10:34:22,256 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:22,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 10:34:22,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:22,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:22,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:22,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:22,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:22,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:22,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:23,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 10:34:23,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:34:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:34:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:34:23,152 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 10:34:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:23,278 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:34:23,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:34:23,279 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 10:34:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:23,280 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:23,280 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:34:23,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:34:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:34:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:34:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:34:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:34:23,286 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 10:34:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:23,286 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:34:23,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:34:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:34:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:34:23,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:23,287 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 10:34:23,287 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:23,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 10:34:23,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:23,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:23,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:23,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:23,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:23,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:23,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:24,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 10:34:24,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:34:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:34:24,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:34:24,245 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 10:34:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:24,382 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:34:24,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:34:24,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 10:34:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:24,384 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:24,384 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:34:24,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:34:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:34:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:34:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:34:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:34:24,390 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 10:34:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:24,390 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:34:24,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:34:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:34:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:34:24,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:24,391 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 10:34:24,391 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:24,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 10:34:24,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:24,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:24,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:24,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:25,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:25,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:25,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:34:25,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:25,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:26,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:26,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 10:34:26,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:34:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:34:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:34:26,020 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 10:34:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:26,132 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:34:26,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:34:26,133 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 10:34:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:26,134 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:34:26,134 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:34:26,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:34:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:34:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:34:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:34:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:34:26,138 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 10:34:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:26,138 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:34:26,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:34:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:34:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:34:26,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:26,139 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 10:34:26,139 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:26,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 10:34:26,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:26,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:26,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:26,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:26,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:26,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:26,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:26,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:26,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:26,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:28,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 10:34:28,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:34:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:34:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:28,777 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 10:34:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:29,041 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:34:29,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:34:29,042 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 10:34:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:29,043 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:34:29,043 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:34:29,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:34:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:34:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:34:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:34:29,049 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 10:34:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:29,049 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:34:29,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:34:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:34:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:34:29,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:29,050 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 10:34:29,050 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:29,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 10:34:29,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:29,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:29,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:29,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:29,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:29,545 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:29,571 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:34:29,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:29,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:30,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 10:34:30,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:34:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:34:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:30,168 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 10:34:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:30,322 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:34:30,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:34:30,323 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 10:34:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:30,323 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:34:30,323 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:34:30,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:34:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:34:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:34:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:34:30,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 10:34:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:30,328 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:34:30,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:34:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:34:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:34:30,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:30,328 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 10:34:30,329 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:30,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 10:34:30,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:30,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:30,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:30,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:31,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:31,075 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:31,106 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:34:31,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:31,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:31,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 10:34:31,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:34:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:34:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:31,809 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 10:34:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:31,929 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:34:31,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:34:31,929 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 10:34:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:31,930 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:34:31,930 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:34:31,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:34:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:34:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:34:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:34:31,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 10:34:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:31,935 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:34:31,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:34:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:34:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:34:31,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:31,936 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 10:34:31,936 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:31,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 10:34:31,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:31,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:31,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:31,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:32,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:32,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:33,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 10:34:33,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:34:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:34:33,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:33,190 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 10:34:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:33,371 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:34:33,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:34:33,372 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 10:34:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:33,373 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:34:33,373 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:34:33,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:34:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:34:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:34:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:34:33,378 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 10:34:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:33,379 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:34:33,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:34:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:34:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:34:33,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:33,380 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 10:34:33,380 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:33,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 10:34:33,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:33,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:33,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:33,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:33,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:33,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:33,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:33,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:33,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:34,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 10:34:34,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:34:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:34:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:34:34,707 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 10:34:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:34,835 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:34:34,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:34:34,836 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 10:34:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:34,837 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:34:34,837 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:34:34,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:34:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:34:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:34:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:34:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:34:34,842 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 10:34:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:34,843 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:34:34,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:34:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:34:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:34:34,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:34,844 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 10:34:34,844 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:34,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 10:34:34,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:34,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:34,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:34,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:35,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:35,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:35,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:34:35,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:35,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:36,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:36,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 10:34:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:34:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:34:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:34:36,582 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 10:34:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:36,782 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:34:36,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:34:36,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 10:34:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:36,783 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:34:36,783 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:34:36,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:34:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:34:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:34:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:34:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:34:36,787 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 10:34:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:36,787 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:34:36,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:34:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:34:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:34:36,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:36,788 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 10:34:36,788 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:36,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 10:34:36,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:36,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:36,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:36,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:37,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:37,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:37,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:37,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:37,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:38,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:38,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 10:34:38,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:34:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:34:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:34:38,310 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 10:34:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:38,484 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:34:38,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:34:38,485 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 10:34:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:38,486 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:34:38,486 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:34:38,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:34:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:34:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:34:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:34:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:34:38,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 10:34:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:38,491 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:34:38,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:34:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:34:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:34:38,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:38,492 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 10:34:38,492 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:38,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 10:34:38,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:38,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:38,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:38,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:39,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:39,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:39,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:34:39,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:39,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:40,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 10:34:40,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:34:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:34:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:34:40,541 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 10:34:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:40,922 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:34:40,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:34:40,922 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 10:34:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:40,923 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:34:40,923 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:34:40,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:34:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:34:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:34:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:34:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:34:40,926 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 10:34:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:40,926 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:34:40,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:34:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:34:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:34:40,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:40,927 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 10:34:40,927 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:40,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 10:34:40,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:40,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:40,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:40,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:40,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:41,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:41,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:41,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:41,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:34:41,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:41,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:42,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 10:34:42,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:34:42,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:34:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:34:42,674 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 10:34:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:42,848 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:34:42,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:34:42,848 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 10:34:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:42,849 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:34:42,849 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:34:42,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:34:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:34:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:34:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:34:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:34:42,854 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 10:34:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:42,855 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:34:42,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:34:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:34:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:34:42,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:42,856 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 10:34:42,856 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:42,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 10:34:42,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:42,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:42,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:42,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:43,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:43,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:43,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:43,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:44,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 10:34:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:34:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:34:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:34:44,717 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 10:34:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:44,875 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:34:44,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:34:44,876 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 10:34:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:44,877 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:34:44,877 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:34:44,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:34:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:34:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:34:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:34:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:34:44,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 10:34:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:44,882 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:34:44,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:34:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:34:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:34:44,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:44,883 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 10:34:44,883 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:44,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 10:34:44,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:44,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:45,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:45,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:45,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:45,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:45,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:45,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:46,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:46,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 10:34:46,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:34:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:34:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:34:46,996 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 10:34:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:47,158 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:34:47,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:34:47,159 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 10:34:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:47,160 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:34:47,160 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:34:47,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:34:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:34:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:34:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:34:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:34:47,164 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 10:34:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:47,165 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:34:47,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:34:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:34:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:34:47,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:47,165 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 10:34:47,165 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:47,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 10:34:47,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:47,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:48,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:48,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:48,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:48,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:34:48,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:48,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:49,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 10:34:49,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:34:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:34:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:34:49,221 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 10:34:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:49,397 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:34:49,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:34:49,398 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 10:34:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:49,399 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:34:49,399 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:34:49,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:34:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:34:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:34:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:34:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:34:49,403 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 10:34:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:49,404 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:34:49,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:34:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:34:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:34:49,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:49,405 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 10:34:49,405 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:49,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 10:34:49,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:49,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:50,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:50,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:50,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:50,266 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:50,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:50,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:51,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 10:34:51,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:34:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:34:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:34:51,592 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 10:34:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:51,758 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:34:51,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:34:51,759 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 10:34:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:51,760 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:34:51,760 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:34:51,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:34:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:34:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:34:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:34:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:34:51,766 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 10:34:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:51,766 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:34:51,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:34:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:34:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:34:51,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:51,767 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 10:34:51,768 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:51,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 10:34:51,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:51,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:51,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:51,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:52,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:52,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:52,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:52,687 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:34:52,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:52,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:53,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 10:34:53,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:34:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:34:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:34:53,842 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 10:34:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:54,034 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:34:54,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:34:54,035 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 10:34:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:54,036 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:34:54,036 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:34:54,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:34:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:34:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:34:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:34:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:34:54,041 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 10:34:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:54,042 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:34:54,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:34:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:34:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:34:54,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:54,043 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 10:34:54,043 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:54,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 10:34:54,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:54,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:54,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:54,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:54,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:54,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:34:54,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:54,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:56,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:56,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 10:34:56,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:34:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:34:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:34:56,265 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 10:34:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:56,526 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:34:56,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:34:56,527 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 10:34:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:56,527 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:34:56,528 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:34:56,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:34:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:34:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:34:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:34:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:34:56,532 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 10:34:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:56,532 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:34:56,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:34:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:34:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:34:56,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:56,533 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 10:34:56,533 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:56,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 10:34:56,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:56,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:56,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:56,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:56,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:58,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:58,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:58,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:59,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:59,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 10:34:59,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:34:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:34:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:34:59,421 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 10:34:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:59,609 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:34:59,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:34:59,610 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 10:34:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:59,611 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:34:59,611 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:34:59,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:34:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:34:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:34:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:34:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:34:59,616 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 10:34:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:59,616 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:34:59,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:34:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:34:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:34:59,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:59,617 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 10:34:59,618 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:59,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 10:34:59,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:59,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:59,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:59,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:00,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:00,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:00,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:00,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:00,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:02,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 10:35:02,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:35:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:35:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:35:02,194 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 10:35:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:02,376 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:35:02,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:35:02,376 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 10:35:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:02,377 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:35:02,377 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:35:02,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:35:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:35:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:35:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:35:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:35:02,383 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 10:35:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:02,383 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:35:02,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:35:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:35:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:35:02,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:02,384 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 10:35:02,384 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:02,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 10:35:02,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:02,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:02,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:02,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:03,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:03,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:03,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:03,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 10:35:03,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:03,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:04,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 10:35:04,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:35:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:35:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:35:04,987 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 10:35:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:05,234 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:35:05,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:35:05,235 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 10:35:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:05,236 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:35:05,236 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:35:05,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:35:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:35:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:35:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:35:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:35:05,241 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 10:35:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:05,241 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:35:05,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:35:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:35:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:35:05,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:05,242 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 10:35:05,242 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:05,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 10:35:05,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:05,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:05,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:05,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:06,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:06,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:06,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:06,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:06,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:06,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:07,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 10:35:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:35:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:35:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:35:07,956 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 10:35:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:08,143 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:35:08,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:35:08,143 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 10:35:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:08,145 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:35:08,145 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:35:08,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:35:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:35:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:35:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:35:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:35:08,150 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 10:35:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:08,150 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:35:08,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:35:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:35:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:35:08,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:08,151 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 10:35:08,151 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:08,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 10:35:08,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:08,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:08,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:08,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:08,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:09,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:09,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:09,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 10:35:09,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:09,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:11,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:11,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 10:35:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:35:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:35:11,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:35:11,150 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 10:35:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:11,359 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:35:11,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:35:11,360 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 10:35:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:11,361 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:35:11,361 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:35:11,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:35:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:35:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:35:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:35:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:35:11,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 10:35:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:11,367 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:35:11,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:35:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:35:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:35:11,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:11,368 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 10:35:11,369 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:11,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 10:35:11,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:11,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:11,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:11,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:11,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:12,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:12,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:12,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:35:12,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:12,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:14,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 10:35:14,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:35:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:35:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:35:14,347 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 10:35:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:14,591 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:35:14,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:35:14,592 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 10:35:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:14,593 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:35:14,593 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:35:14,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:35:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:35:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:35:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:35:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:35:14,598 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 10:35:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:14,599 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:35:14,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:35:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:35:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:35:14,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:14,599 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 10:35:14,600 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:14,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 10:35:14,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:14,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:14,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:14,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:15,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:15,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:15,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:15,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:18,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 10:35:18,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:35:18,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:35:18,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:35:18,538 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 10:35:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:18,825 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:35:18,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:35:18,826 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 10:35:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:18,827 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:35:18,827 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:35:18,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:35:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:35:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:35:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:35:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:35:18,832 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 10:35:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:18,833 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:35:18,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:35:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:35:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:35:18,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:18,834 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 10:35:18,834 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:18,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 10:35:18,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:18,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:19,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:19,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:20,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:20,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:20,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:20,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:21,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 10:35:21,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:35:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:35:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:35:21,555 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 10:35:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:22,985 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:35:22,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:35:22,985 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 10:35:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:22,987 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:35:22,987 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:35:22,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:35:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:35:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:35:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:35:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:35:22,993 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 10:35:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:22,993 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:35:22,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:35:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:35:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:35:22,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:22,994 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 10:35:22,994 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:22,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 10:35:22,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:22,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:22,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:24,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:24,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:24,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:35:24,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:24,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:26,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:26,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 10:35:26,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:35:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:35:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:35:26,344 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 10:35:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:26,549 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:35:26,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:35:26,550 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 10:35:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:26,551 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:35:26,551 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:35:26,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:35:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:35:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:35:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:35:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:35:26,558 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 10:35:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:26,558 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:35:26,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:35:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:35:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:35:26,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:26,559 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 10:35:26,559 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:26,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 10:35:26,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:26,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:26,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:26,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:26,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:28,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:28,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:28,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:28,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:28,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:28,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:30,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:30,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 10:35:30,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:35:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:35:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:35:30,257 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 10:35:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:30,466 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:35:30,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:35:30,467 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 10:35:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:30,468 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:35:30,468 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:35:30,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:35:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:35:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:35:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:35:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:35:30,473 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 10:35:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:30,473 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:35:30,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:35:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:35:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:35:30,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:30,474 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 10:35:30,474 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:30,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 10:35:30,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:30,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:30,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:30,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:31,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:31,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:31,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:31,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 10:35:31,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:31,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:33,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:33,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 10:35:33,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:35:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:35:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:35:33,744 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 10:35:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:33,958 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:35:33,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:35:33,959 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 10:35:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:33,960 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:35:33,960 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:35:33,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:35:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:35:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:35:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:35:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 10:35:33,965 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 10:35:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:33,965 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 10:35:33,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:35:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 10:35:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:35:33,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:33,965 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 10:35:33,966 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:33,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 10:35:33,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:33,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:33,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:33,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:33,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:35,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:35,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:35,776 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:35,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:35:35,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:35,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:37,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:37,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 10:35:37,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:35:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:35:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:35:37,928 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 10:35:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:38,162 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:35:38,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:35:38,162 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 10:35:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:38,164 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:35:38,164 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:35:38,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:35:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:35:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:35:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:35:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 10:35:38,169 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 10:35:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:38,169 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 10:35:38,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:35:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 10:35:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:35:38,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:38,170 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 10:35:38,170 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:38,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 10:35:38,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:38,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:38,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:38,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:38,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:39,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:39,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:39,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:41,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:41,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 10:35:41,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:35:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:35:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:35:41,343 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 10:35:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:41,762 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:35:41,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:35:41,763 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 10:35:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:41,764 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:35:41,764 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:35:41,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:35:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:35:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:35:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:35:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 10:35:41,770 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 10:35:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:41,771 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 10:35:41,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:35:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 10:35:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:35:41,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:41,771 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 10:35:41,772 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:41,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 10:35:41,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:41,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:41,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:41,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:41,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:43,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:43,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:43,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:43,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:43,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:43,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:45,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:45,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 10:35:45,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:35:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:35:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:35:45,551 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 10:35:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:45,848 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:35:45,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:35:45,848 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 10:35:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:45,850 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:35:45,850 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:35:45,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:35:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:35:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:35:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:35:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 10:35:45,854 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 10:35:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:45,855 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 10:35:45,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:35:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 10:35:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 10:35:45,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:45,855 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 10:35:45,855 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:45,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 10:35:45,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:45,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:45,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:45,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:47,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:47,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:47,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:47,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 10:35:47,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:47,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:49,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:49,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 10:35:49,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:35:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:35:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:35:49,739 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 10:35:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:49,988 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:35:49,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:35:49,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 10:35:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:49,990 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:35:49,990 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:35:49,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:35:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:35:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 10:35:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:35:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 10:35:49,994 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 10:35:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:49,994 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 10:35:49,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:35:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 10:35:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:35:49,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:49,995 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 10:35:49,995 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:49,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 10:35:49,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:49,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:49,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:51,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:51,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:35:51,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:51,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:51,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:51,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:54,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:54,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 10:35:54,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:35:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:35:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 10:35:54,268 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 10:35:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:54,569 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:35:54,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:35:54,570 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 10:35:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:54,571 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:35:54,571 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:35:54,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 10:35:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:35:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 10:35:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 10:35:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 10:35:54,576 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 10:35:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:54,577 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 10:35:54,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:35:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 10:35:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 10:35:54,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:54,578 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 10:35:54,578 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:54,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 10:35:54,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:54,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:54,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:54,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:56,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:56,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:56,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:56,377 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 10:35:56,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:56,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:58,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:58,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 10:35:58,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:35:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:35:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 10:35:58,879 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 10:35:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:59,138 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:35:59,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:35:59,139 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 10:35:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:59,140 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:35:59,140 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 10:35:59,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 10:35:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 10:35:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 10:35:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:35:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 10:35:59,146 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 10:35:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:59,146 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 10:35:59,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:35:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 10:35:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 10:35:59,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:59,147 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 10:35:59,147 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:59,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 10:35:59,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:59,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:59,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:01,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:01,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:01,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:01,552 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:36:01,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:01,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:03,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:03,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 10:36:03,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:36:03,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:36:03,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 10:36:03,949 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 10:36:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:04,211 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:36:04,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:36:04,212 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 10:36:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:04,213 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:36:04,213 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 10:36:04,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 10:36:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 10:36:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 10:36:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 10:36:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 10:36:04,220 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 10:36:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:04,220 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 10:36:04,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:36:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 10:36:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:36:04,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:04,221 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 10:36:04,221 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:04,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 10:36:04,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:04,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:04,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:04,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:05,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:05,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:05,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:05,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:08,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:08,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 10:36:08,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:36:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:36:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:36:08,264 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 10:36:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:08,563 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:36:08,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:36:08,564 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 10:36:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:08,565 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:36:08,565 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:36:08,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:36:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:36:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 10:36:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 10:36:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 10:36:08,570 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 10:36:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:08,570 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 10:36:08,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:36:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 10:36:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 10:36:08,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:08,571 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 10:36:08,571 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:08,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 10:36:08,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:08,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:08,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:08,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:10,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:10,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:10,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:10,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:10,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:10,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:12,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:12,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 10:36:12,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:36:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:36:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 10:36:12,520 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 10:36:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:12,764 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:36:12,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:36:12,765 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 10:36:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:12,766 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:36:12,766 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:36:12,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 10:36:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:36:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 10:36:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 10:36:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 10:36:12,771 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 10:36:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:12,771 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 10:36:12,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:36:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 10:36:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 10:36:12,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:12,772 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 10:36:12,774 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:12,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 10:36:12,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:12,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:12,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:12,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:12,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:14,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:14,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:14,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:14,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 10:36:14,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:14,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:17,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:17,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 10:36:17,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:36:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:36:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:36:17,116 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 10:36:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:17,422 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:36:17,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:36:17,422 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 10:36:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:17,423 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:36:17,423 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 10:36:17,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:36:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 10:36:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 10:36:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 10:36:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 10:36:17,429 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 10:36:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:17,430 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 10:36:17,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:36:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 10:36:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 10:36:17,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:17,431 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 10:36:17,431 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:17,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 10:36:17,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:17,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:17,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:17,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:17,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:19,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:19,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:19,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:19,534 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:19,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:19,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:21,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:21,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 10:36:21,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:36:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:36:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 10:36:21,871 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 10:36:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:22,134 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:36:22,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:36:22,135 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 10:36:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:22,136 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:36:22,136 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 10:36:22,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 10:36:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 10:36:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 10:36:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 10:36:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 10:36:22,141 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 10:36:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:22,142 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 10:36:22,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:36:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 10:36:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 10:36:22,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:22,143 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 10:36:22,143 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:22,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 10:36:22,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:22,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:22,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:22,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:22,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:24,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:24,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:24,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:24,379 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 10:36:24,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:24,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:27,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:27,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 10:36:27,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 10:36:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 10:36:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 10:36:27,643 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 10:36:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:28,015 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:36:28,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:36:28,016 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 10:36:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:28,017 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:36:28,018 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 10:36:28,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 10:36:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 10:36:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 10:36:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:36:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 10:36:28,023 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 10:36:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:28,023 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 10:36:28,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 10:36:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 10:36:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 10:36:28,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:28,025 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 10:36:28,025 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:28,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 10:36:28,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:28,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:28,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:28,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:28,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:30,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:30,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:30,416 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:30,486 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:36:30,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:30,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:33,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:33,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 10:36:33,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 10:36:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 10:36:33,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 10:36:33,014 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 10:36:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:33,330 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:36:33,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:36:33,330 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 10:36:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:33,331 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:36:33,331 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 10:36:33,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 10:36:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 10:36:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 10:36:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 10:36:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 10:36:33,335 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 10:36:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:33,335 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 10:36:33,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 10:36:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 10:36:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:36:33,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:33,336 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 10:36:33,336 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:33,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 10:36:33,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:33,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:33,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:33,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:33,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:35,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:35,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 10:36:38,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:36:38,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:36:38,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:36:38,144 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 10:36:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:38,455 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:36:38,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:36:38,455 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 10:36:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:38,456 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:36:38,457 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:36:38,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:36:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:36:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 10:36:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 10:36:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 10:36:38,461 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 10:36:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:38,462 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 10:36:38,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:36:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 10:36:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 10:36:38,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:38,463 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 10:36:38,463 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:38,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 10:36:38,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:38,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:40,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:40,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:40,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:40,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:40,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:43,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 10:36:43,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 10:36:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 10:36:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 10:36:43,383 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 10:36:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:43,731 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:36:43,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:36:43,731 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 10:36:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:43,732 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:36:43,732 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 10:36:43,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 10:36:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 10:36:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 10:36:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 10:36:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 10:36:43,737 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 10:36:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:43,738 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 10:36:43,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 10:36:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 10:36:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 10:36:43,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:43,739 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 10:36:43,739 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:43,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:43,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 10:36:43,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:43,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:43,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:43,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:45,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:45,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:45,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:46,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:36:46,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:46,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:48,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 10:36:48,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 10:36:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 10:36:48,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:36:48,713 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 10:36:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:49,188 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:36:49,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:36:49,188 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 10:36:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:49,189 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:36:49,189 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 10:36:49,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:36:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 10:36:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 10:36:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 10:36:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 10:36:49,194 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 10:36:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:49,195 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 10:36:49,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 10:36:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 10:36:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 10:36:49,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:49,195 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 10:36:49,196 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:49,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 10:36:49,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:49,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:49,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:49,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:51,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:51,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:51,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:51,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:51,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:54,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:54,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 10:36:54,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 10:36:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 10:36:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 10:36:54,732 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 10:36:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:55,120 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:36:55,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:36:55,121 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 10:36:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:55,122 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:36:55,122 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 10:36:55,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 10:36:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 10:36:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 10:36:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 10:36:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 10:36:55,128 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 10:36:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:55,129 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 10:36:55,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 10:36:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 10:36:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 10:36:55,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:55,130 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 10:36:55,130 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:55,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 10:36:55,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:55,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:57,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:57,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:57,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:57,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 10:36:57,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:57,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:00,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:00,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 10:37:00,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 10:37:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 10:37:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 10:37:00,918 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 10:37:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:01,282 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:37:01,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:37:01,283 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 10:37:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:01,284 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:37:01,285 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 10:37:01,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 10:37:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 10:37:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 10:37:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 10:37:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 10:37:01,291 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 10:37:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:01,291 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 10:37:01,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 10:37:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 10:37:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 10:37:01,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:01,292 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 10:37:01,292 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:01,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 10:37:01,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:01,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:01,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:01,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:03,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:03,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:03,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:37:03,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:03,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:06,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 10:37:06,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 10:37:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 10:37:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 10:37:06,956 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 10:37:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:07,454 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:37:07,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:37:07,455 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 10:37:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:07,456 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:37:07,457 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 10:37:07,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 10:37:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 10:37:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 10:37:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 10:37:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 10:37:07,463 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 10:37:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 10:37:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 10:37:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 10:37:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 10:37:07,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:07,464 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 10:37:07,465 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:07,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 10:37:07,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:07,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:07,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:07,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:10,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:10,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:10,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:10,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:13,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 10:37:13,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 10:37:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 10:37:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 10:37:13,131 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 10:37:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:13,498 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 10:37:13,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:37:13,498 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 10:37:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:13,499 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:37:13,499 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 10:37:13,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 10:37:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 10:37:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 10:37:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 10:37:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 10:37:13,505 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 10:37:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:13,506 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 10:37:13,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 10:37:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 10:37:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 10:37:13,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:13,507 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 10:37:13,507 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:13,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 10:37:13,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:13,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:16,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:16,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:16,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:16,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:16,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:16,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:19,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:19,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 10:37:19,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 10:37:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 10:37:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 10:37:19,180 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 10:37:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:19,644 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 10:37:19,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:37:19,645 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 10:37:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:19,646 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:37:19,646 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 10:37:19,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 10:37:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 10:37:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 10:37:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 10:37:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 10:37:19,651 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 10:37:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:19,651 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 10:37:19,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 10:37:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 10:37:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 10:37:19,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:19,652 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 10:37:19,652 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:19,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 10:37:19,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:19,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:19,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:19,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:19,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:22,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:22,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:22,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:22,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 10:37:22,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:22,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:25,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:25,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 10:37:25,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 10:37:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 10:37:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 10:37:25,658 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 10:37:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:26,069 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 10:37:26,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:37:26,070 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 10:37:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:26,071 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:37:26,071 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 10:37:26,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 10:37:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 10:37:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 10:37:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 10:37:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 10:37:26,076 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 10:37:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:26,077 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 10:37:26,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 10:37:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 10:37:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 10:37:26,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:26,077 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 10:37:26,078 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:26,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 10:37:26,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:26,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:26,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:26,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:28,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:28,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:28,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:28,651 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:28,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:28,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:32,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:32,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 10:37:32,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 10:37:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 10:37:32,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 10:37:32,078 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 10:37:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:32,427 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 10:37:32,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:37:32,427 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 10:37:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:32,429 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:37:32,429 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 10:37:32,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 10:37:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 10:37:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 10:37:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 10:37:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 10:37:32,434 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 10:37:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:32,434 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 10:37:32,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 10:37:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 10:37:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 10:37:32,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:32,435 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 10:37:32,435 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:32,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 10:37:32,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:32,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:32,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:32,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:32,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:35,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:35,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:35,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:35,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 10:37:35,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:35,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:38,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:38,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 10:37:38,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 10:37:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 10:37:38,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 10:37:38,636 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 10:37:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:39,013 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 10:37:39,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:37:39,014 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 10:37:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:39,015 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:37:39,015 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 10:37:39,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 10:37:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 10:37:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 10:37:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 10:37:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 10:37:39,022 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 10:37:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:39,023 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 10:37:39,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 10:37:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 10:37:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 10:37:39,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:39,024 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 10:37:39,024 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:39,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 10:37:39,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:39,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:39,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:41,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:41,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:41,971 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:42,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 10:37:42,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:42,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:45,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:45,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 10:37:45,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 10:37:45,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 10:37:45,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 10:37:45,633 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 10:37:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:46,032 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 10:37:46,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:37:46,032 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 10:37:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:46,034 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:37:46,034 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 10:37:46,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 10:37:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 10:37:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 10:37:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 10:37:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 10:37:46,040 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 10:37:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:46,040 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 10:37:46,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 10:37:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 10:37:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 10:37:46,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:46,041 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 10:37:46,041 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:46,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 10:37:46,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:46,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:46,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:46,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:46,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:48,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:48,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:48,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:48,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:52,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:52,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 10:37:52,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 10:37:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 10:37:52,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 10:37:52,415 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 10:37:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:52,799 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 10:37:52,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:37:52,800 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 10:37:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:52,801 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:37:52,801 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 10:37:52,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 10:37:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 10:37:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 10:37:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 10:37:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 10:37:52,808 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 10:37:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:52,808 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 10:37:52,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 10:37:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 10:37:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 10:37:52,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:52,809 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 10:37:52,809 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:52,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:52,810 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 10:37:52,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:52,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:52,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:52,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:52,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:55,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:55,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:55,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:55,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:55,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:55,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:59,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:59,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 10:37:59,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 10:37:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 10:37:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 10:37:59,352 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 10:37:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:59,743 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 10:37:59,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:37:59,743 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 10:37:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:59,744 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:37:59,744 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 10:37:59,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 10:37:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 10:37:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 10:37:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 10:37:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 10:37:59,748 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 10:37:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:59,749 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 10:37:59,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 10:37:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 10:37:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 10:37:59,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:59,749 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 10:37:59,750 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:59,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 10:37:59,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:59,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:59,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:38:00,686 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:38:00,690 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:38:00,690 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:38:00 BoogieIcfgContainer [2018-09-30 10:38:00,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:38:00,691 INFO L168 Benchmark]: Toolchain (without parser) took 239783.82 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 184.4 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:38:00,693 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:38:00,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:38:00,694 INFO L168 Benchmark]: Boogie Preprocessor took 20.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:38:00,694 INFO L168 Benchmark]: RCFGBuilder took 268.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:38:00,694 INFO L168 Benchmark]: TraceAbstraction took 239448.24 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 163.3 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2018-09-30 10:38:00,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239448.24 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 163.3 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 166 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.3s OverallTime, 82 OverallIterations, 82 TraceHistogramMax, 19.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13557 SolverSat, 260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354240 ImplicationChecksByTransitivity, 205.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=81, 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, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 210.6s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-38-00-706.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-38-00-706.csv Completed graceful shutdown