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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:52:52,639 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:52:52,641 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:52:52,653 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:52:52,653 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:52:52,654 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:52:52,656 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:52:52,657 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:52:52,659 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:52:52,660 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:52:52,662 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:52:52,703 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:52:52,718 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:52:52,718 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:52:52,719 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:52:52,719 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:52:52,719 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:52:52,720 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:52:52,720 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:52:52,720 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:52:52,720 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:52:52,720 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:52:52,721 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:52:52,721 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:52:52,721 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:52:52,721 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:52:52,721 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:52:52,722 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:52:52,722 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:52:52,722 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:52:52,722 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:52:52,722 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:52:52,723 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:52:52,723 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:52:52,723 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:52:52,723 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:52:52,723 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:52:52,723 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:52:52,724 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:52:52,724 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:52:52,724 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:52:52,724 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:52:52,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:52:52,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:52:52,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:52:52,787 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:52:52,788 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:52:52,789 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-23 19:52:52,789 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-23 19:52:52,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:52:52,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:52:52,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:52:52,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:52:52,840 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:52:52,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,879 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:52:52,879 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:52:52,879 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:52:52,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:52:52,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:52:52,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:52:52,883 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:52:52,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... [2018-09-23 19:52:52,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:52:52,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:52:52,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:52:52,910 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:52:52,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:52:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-23 19:52:52,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-23 19:52:53,177 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:52:53,178 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:52:53 BoogieIcfgContainer [2018-09-23 19:52:53,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:52:53,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:52:53,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:52:53,182 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:52:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:52:52" (1/2) ... [2018-09-23 19:52:53,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197e6926 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:52:53, skipping insertion in model container [2018-09-23 19:52:53,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:52:53" (2/2) ... [2018-09-23 19:52:53,186 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-23 19:52:53,195 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:52:53,202 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-23 19:52:53,252 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:52:53,253 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:52:53,253 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:52:53,253 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:52:53,254 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:52:53,254 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:52:53,254 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:52:53,254 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:52:53,254 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:52:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 19:52:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:52:53,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:53,277 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:52:53,279 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:53,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:53,285 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-23 19:52:53,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:53,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:53,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:53,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,415 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:52:53,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:52:53,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:52:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:52:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:52:53,433 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-23 19:52:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:53,523 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 19:52:53,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:52:53,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 19:52:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:53,549 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:52:53,550 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:52:53,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:52:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:52:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:52:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:52:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 19:52:53,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-23 19:52:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:53,615 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 19:52:53,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:52:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 19:52:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:52:53,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:53,616 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:52:53,617 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:53,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-23 19:52:53,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:53,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:53,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:53,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,690 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:52:53,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:52:53,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:52:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:52:53,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:52:53,693 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-23 19:52:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:53,705 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:52:53,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:52:53,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 19:52:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:53,706 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:52:53,707 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:52:53,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:52:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:52:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:52:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:52:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-23 19:52:53,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-23 19:52:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:53,711 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-23 19:52:53,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:52:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-23 19:52:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:52:53,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:53,712 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:52:53,712 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:53,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:53,713 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-23 19:52:53,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:53,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:53,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:53,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,785 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:52:53,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:52:53,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:52:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:52:53,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:52:53,787 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-23 19:52:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:53,851 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:52:53,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:52:53,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:52:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:53,854 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:52:53,854 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:52:53,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:52:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:52:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:52:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:52:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-23 19:52:53,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-23 19:52:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:53,858 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-23 19:52:53,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:52:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-23 19:52:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:52:53,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:53,861 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:52:53,861 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:53,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-23 19:52:53,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:53,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:53,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:53,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:53,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:53,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:54,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 19:52:54,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:52:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:52:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:52:54,062 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-23 19:52:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:54,127 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-23 19:52:54,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:52:54,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-23 19:52:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:54,129 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:52:54,129 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:52:54,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:52:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:52:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-23 19:52:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:52:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 19:52:54,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-23 19:52:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:54,133 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 19:52:54,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:52:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 19:52:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:52:54,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:54,134 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:52:54,134 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:54,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-23 19:52:54,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:54,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:54,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:54,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:54,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:54,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:54,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:54,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:52:54,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:52:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:52:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,298 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-23 19:52:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:54,444 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-23 19:52:54,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:52:54,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:52:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:54,445 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:52:54,445 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:52:54,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:52:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:52:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:52:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 19:52:54,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-23 19:52:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:54,451 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 19:52:54,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:52:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 19:52:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:52:54,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:54,452 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:52:54,453 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:54,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-23 19:52:54,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:54,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:54,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:54,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:54,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:54,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-23 19:52:54,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:54,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:54,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:52:54,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:52:54,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:52:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,604 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 19:52:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:54,684 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 19:52:54,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:52:54,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:52:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:54,685 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:52:54,685 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:52:54,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:52:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:52:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:52:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-23 19:52:54,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-23 19:52:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:54,689 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-23 19:52:54,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:52:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-23 19:52:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:52:54,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:54,690 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:52:54,690 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:54,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-23 19:52:54,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:54,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:54,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:54,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:54,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:54,878 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:54,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:54,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:54,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:52:54,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:52:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:52:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,912 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-23 19:52:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:54,974 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-23 19:52:54,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:52:54,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-23 19:52:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:54,977 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:52:54,977 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:52:54,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:52:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:52:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-23 19:52:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:52:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-23 19:52:54,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-23 19:52:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:54,982 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-23 19:52:54,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:52:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-23 19:52:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:52:54,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:54,983 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-23 19:52:54,983 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:54,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-23 19:52:54,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:54,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:54,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:54,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:55,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:55,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:55,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-23 19:52:55,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:55,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:55,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:52:55,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:52:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:52:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:55,231 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-23 19:52:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:55,272 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-23 19:52:55,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:52:55,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 19:52:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:55,273 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:52:55,273 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:52:55,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:52:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:52:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:52:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 19:52:55,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-23 19:52:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:55,277 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 19:52:55,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:52:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 19:52:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:52:55,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:55,278 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-23 19:52:55,279 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:55,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-23 19:52:55,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:55,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:55,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:55,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:55,362 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:55,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-23 19:52:55,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:55,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:55,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:52:55,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:52:55,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:52:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:55,410 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-23 19:52:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:55,448 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-23 19:52:55,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:52:55,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 19:52:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:55,450 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:52:55,450 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:52:55,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:52:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:52:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:52:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-23 19:52:55,454 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-23 19:52:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:55,454 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-23 19:52:55,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:52:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-23 19:52:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:52:55,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:55,455 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:52:55,455 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:55,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:55,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-23 19:52:55,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:55,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:55,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:55,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:55,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:55,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:55,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:55,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:52:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:52:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:52:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:55,762 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-23 19:52:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:56,017 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-23 19:52:56,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:52:56,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-23 19:52:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:56,018 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:52:56,019 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:52:56,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:52:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:52:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-23 19:52:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:52:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 19:52:56,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-23 19:52:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:56,023 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 19:52:56,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:52:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 19:52:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:52:56,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:56,024 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-23 19:52:56,024 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:56,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-23 19:52:56,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:56,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:56,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:56,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:56,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:56,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:56,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:56,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:56,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:52:56,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:52:56,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:52:56,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,306 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-23 19:52:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:56,349 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-23 19:52:56,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:52:56,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 19:52:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:56,350 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:52:56,350 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:52:56,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:52:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:52:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:52:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 19:52:56,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-23 19:52:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:56,354 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 19:52:56,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:52:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 19:52:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:52:56,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:56,355 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-23 19:52:56,355 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:56,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-23 19:52:56,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:56,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:56,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:56,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:52:56,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:56,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:56,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:52:56,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:52:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:52:56,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,517 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-23 19:52:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:56,550 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 19:52:56,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:52:56,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 19:52:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:56,552 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:52:56,552 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:52:56,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:52:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:52:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:52:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-23 19:52:56,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-23 19:52:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:56,557 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-23 19:52:56,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:52:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-23 19:52:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:52:56,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:56,558 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-23 19:52:56,558 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:56,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-23 19:52:56,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:56,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:56,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:56,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:56,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:56,730 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:56,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:56,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:56,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:52:56,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:52:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:52:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,772 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-23 19:52:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:56,845 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-23 19:52:56,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:52:56,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-23 19:52:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:56,846 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:52:56,846 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:52:56,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:52:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:52:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-23 19:52:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:52:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 19:52:56,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-23 19:52:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:56,851 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 19:52:56,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:52:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 19:52:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:52:56,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:56,852 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-23 19:52:56,852 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:56,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:56,853 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-23 19:52:56,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:56,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:56,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:56,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:56,994 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:57,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:52:57,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:57,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:52:57,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:52:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:52:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,059 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-23 19:52:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,125 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-23 19:52:57,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:52:57,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 19:52:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,126 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:52:57,126 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:52:57,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:52:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:52:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:52:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 19:52:57,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-23 19:52:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,129 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 19:52:57,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:52:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 19:52:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:52:57,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,130 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-23 19:52:57,131 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-23 19:52:57,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:57,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:57,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:57,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:52:57,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:57,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:52:57,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:52:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:52:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,270 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-23 19:52:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,348 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-23 19:52:57,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:52:57,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 19:52:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,348 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:52:57,349 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:52:57,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:52:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:52:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:52:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-23 19:52:57,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-23 19:52:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,354 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-23 19:52:57,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:52:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-23 19:52:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:52:57,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,355 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-23 19:52:57,355 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-23 19:52:57,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:57,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:57,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:52:57,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:52:57,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:52:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,588 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-23 19:52:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,738 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-23 19:52:57,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:52:57,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-23 19:52:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,740 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:52:57,740 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:52:57,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:52:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:52:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-23 19:52:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:52:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-23 19:52:57,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-23 19:52:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,748 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-23 19:52:57,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:52:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-23 19:52:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:52:57,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,749 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-23 19:52:57,749 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-23 19:52:57,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:57,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:57,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:57,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:57,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:57,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:57,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:52:57,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:52:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:52:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:57,886 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-23 19:52:57,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,976 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-23 19:52:57,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:52:57,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:52:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,977 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:52:57,977 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:52:57,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:52:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:52:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:52:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 19:52:57,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-23 19:52:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,982 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 19:52:57,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:52:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 19:52:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:52:57,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,983 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-23 19:52:57,984 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,984 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-23 19:52:57,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:58,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:58,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:58,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:58,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:52:58,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:58,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:58,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:58,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:52:58,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:52:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:52:58,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:58,124 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-23 19:52:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:58,163 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 19:52:58,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:52:58,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:52:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:58,165 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:52:58,165 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:52:58,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:52:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:52:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:52:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-23 19:52:58,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-23 19:52:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:58,170 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-23 19:52:58,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:52:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-23 19:52:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:52:58,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:58,172 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-23 19:52:58,172 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:58,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-23 19:52:58,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:58,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:58,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:58,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:58,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:58,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:58,335 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:58,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:58,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:58,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:58,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:58,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:52:58,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:52:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:52:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:58,450 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-23 19:52:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:58,754 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-23 19:52:58,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:52:58,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-23 19:52:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:58,755 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:52:58,756 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:52:58,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:52:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:52:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-23 19:52:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:52:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-23 19:52:58,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-23 19:52:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:58,761 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-23 19:52:58,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:52:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-23 19:52:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:52:58,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:58,763 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-23 19:52:58,763 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:58,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:58,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-23 19:52:58,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:58,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:58,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:58,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:59,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:59,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:59,135 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-23 19:52:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:59,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:59,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:52:59,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:52:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:52:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:52:59,167 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-23 19:52:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:59,258 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-23 19:52:59,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:52:59,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:52:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:59,259 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:52:59,259 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:52:59,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:52:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:52:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:52:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:52:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 19:52:59,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-23 19:52:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:59,264 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 19:52:59,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:52:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 19:52:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:52:59,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:59,265 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-23 19:52:59,265 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:59,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-23 19:52:59,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:59,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:59,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:59,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:59,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:59,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:59,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 19:52:59,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:59,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:59,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:52:59,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:52:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:52:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:52:59,413 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-23 19:52:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:59,481 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-23 19:52:59,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:52:59,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:52:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:59,482 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:52:59,482 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:52:59,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:52:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:52:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:52:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:52:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-23 19:52:59,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-23 19:52:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:59,486 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-23 19:52:59,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:52:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-23 19:52:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:59,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:59,487 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-23 19:52:59,488 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:59,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-23 19:52:59,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:59,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:59,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:59,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:59,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:59,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:59,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:52:59,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:52:59,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:52:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:52:59,760 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-23 19:53:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:00,044 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-23 19:53:00,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:53:00,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-23 19:53:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:00,045 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:53:00,045 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:53:00,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:53:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:53:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-23 19:53:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:53:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-23 19:53:00,049 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-23 19:53:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:00,049 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-23 19:53:00,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:53:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-23 19:53:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:53:00,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:00,050 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-23 19:53:00,050 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:00,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-23 19:53:00,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:00,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:00,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:00,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:00,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:00,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:00,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:00,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:00,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:00,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:00,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:00,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:00,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:00,378 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-23 19:53:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:00,635 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-23 19:53:00,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:00,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 19:53:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:00,637 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:53:00,637 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:53:00,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:53:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:53:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:53:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 19:53:00,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-23 19:53:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:00,642 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 19:53:00,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 19:53:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:53:00,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:00,643 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-23 19:53:00,643 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:00,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-23 19:53:00,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:00,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:00,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:00,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:00,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:00,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:00,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:53:00,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:00,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:00,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:00,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:00,942 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-23 19:53:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:00,991 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 19:53:00,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:00,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 19:53:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:00,993 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:53:00,993 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:53:00,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:53:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:53:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:53:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-23 19:53:00,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-23 19:53:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:00,997 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-23 19:53:00,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-23 19:53:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:53:00,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:00,998 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-23 19:53:00,998 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:00,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-23 19:53:00,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:00,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:01,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:01,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:01,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:01,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:01,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:01,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:53:01,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:01,222 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-23 19:53:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:01,354 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-23 19:53:01,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:01,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-23 19:53:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:01,356 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:53:01,356 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:53:01,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:53:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-23 19:53:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:53:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-23 19:53:01,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-23 19:53:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:01,362 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-23 19:53:01,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-23 19:53:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:53:01,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:01,363 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-23 19:53:01,363 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:01,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-23 19:53:01,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:01,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:01,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:01,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:01,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:01,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:01,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:53:01,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:01,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:01,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:53:01,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:53:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:53:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:01,819 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-23 19:53:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:01,901 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-23 19:53:01,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:53:01,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 19:53:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:01,903 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:53:01,903 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:53:01,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:53:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:53:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:53:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 19:53:01,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-23 19:53:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:01,908 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 19:53:01,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:53:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 19:53:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:53:01,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:01,909 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-23 19:53:01,914 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:01,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-23 19:53:01,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:01,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:01,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:01,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:02,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:02,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:02,104 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:53:02,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:02,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:02,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:53:02,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:53:02,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:53:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:02,135 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-23 19:53:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:02,176 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-23 19:53:02,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:53:02,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 19:53:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:02,177 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:53:02,177 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:53:02,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:53:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:53:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:53:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-23 19:53:02,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-23 19:53:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:02,183 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-23 19:53:02,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:53:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-23 19:53:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:53:02,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:02,184 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-23 19:53:02,184 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:02,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-23 19:53:02,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:02,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:02,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:02,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:02,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:02,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:02,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:02,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:02,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:53:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:53:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:02,627 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-23 19:53:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:02,819 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-23 19:53:02,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:53:02,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-23 19:53:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:02,820 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:53:02,821 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:53:02,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:53:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:53:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:53:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-23 19:53:02,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-23 19:53:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:02,825 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-23 19:53:02,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:53:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-23 19:53:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:53:02,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:02,826 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-23 19:53:02,826 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:02,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-23 19:53:02,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:02,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:03,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:03,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:03,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:03,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:03,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:03,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:53:03,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:53:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:53:03,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:03,211 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-23 19:53:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:03,299 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-23 19:53:03,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:53:03,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 19:53:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:03,300 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:53:03,300 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:53:03,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:53:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:53:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:53:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 19:53:03,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-23 19:53:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:03,306 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 19:53:03,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:53:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 19:53:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:53:03,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:03,306 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-23 19:53:03,307 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:03,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-23 19:53:03,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:03,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:03,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:03,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:03,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:03,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:03,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:53:03,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:03,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:03,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:53:03,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:53:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:53:03,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:03,508 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-23 19:53:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:03,553 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 19:53:03,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:53:03,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 19:53:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:03,554 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:53:03,554 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:53:03,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:53:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:53:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:53:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-23 19:53:03,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-23 19:53:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:03,559 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-23 19:53:03,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:53:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-23 19:53:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:53:03,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:03,559 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-23 19:53:03,560 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:03,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-23 19:53:03,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:03,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:03,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:03,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:04,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:04,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:04,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:04,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:04,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:04,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:53:04,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:53:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:53:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:04,727 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-23 19:53:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:04,928 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-23 19:53:04,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:53:04,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-23 19:53:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:04,929 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:53:04,929 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:53:04,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:53:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-23 19:53:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-23 19:53:04,934 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-23 19:53:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:04,935 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-23 19:53:04,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:53:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-23 19:53:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:53:04,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:04,936 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-23 19:53:04,936 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:04,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-23 19:53:04,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:04,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:04,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:04,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:05,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:05,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:53:05,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:05,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:53:05,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:53:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:53:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:05,182 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-23 19:53:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:05,301 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-23 19:53:05,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:53:05,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 19:53:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:05,302 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:53:05,302 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:53:05,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:53:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:53:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:53:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 19:53:05,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-23 19:53:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,308 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 19:53:05,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:53:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 19:53:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:53:05,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,309 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-23 19:53:05,309 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-23 19:53:05,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:05,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:05,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:53:05,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:05,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:53:05,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:53:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:53:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:05,713 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-23 19:53:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:05,823 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-23 19:53:05,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:53:05,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 19:53:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:05,824 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:53:05,824 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:53:05,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:53:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:53:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-23 19:53:05,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-23 19:53:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,827 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-23 19:53:05,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:53:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-23 19:53:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:53:05,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,828 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-23 19:53:05,828 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-23 19:53:05,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:06,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:06,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:06,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:53:06,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:53:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:53:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:06,167 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-23 19:53:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:06,454 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 19:53:06,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:53:06,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-23 19:53:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:06,455 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:53:06,455 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:53:06,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:53:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:53:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-23 19:53:06,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-23 19:53:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:06,460 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-23 19:53:06,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:53:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-23 19:53:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:53:06,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:06,461 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-23 19:53:06,461 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:06,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-23 19:53:06,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:06,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:06,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:06,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:06,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:06,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:06,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:06,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:06,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:06,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:53:06,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:53:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:53:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:06,932 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-23 19:53:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:07,027 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-23 19:53:07,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:53:07,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 19:53:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:07,028 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:07,028 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:53:07,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:53:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:53:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:53:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 19:53:07,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-23 19:53:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:07,033 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 19:53:07,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:53:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 19:53:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:53:07,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:07,033 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-23 19:53:07,034 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:07,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-23 19:53:07,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:07,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:07,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:07,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:07,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:07,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:07,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:53:07,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:07,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:07,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:53:07,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:53:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:53:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:07,281 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-23 19:53:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:07,596 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 19:53:07,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:53:07,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 19:53:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:07,597 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:53:07,597 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:53:07,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:53:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:53:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-23 19:53:07,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-23 19:53:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:07,601 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-23 19:53:07,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:53:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-23 19:53:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:53:07,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:07,601 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-23 19:53:07,602 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:07,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-23 19:53:07,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:07,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:07,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:07,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:08,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:08,143 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:08,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:08,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:08,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:08,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:53:08,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:53:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:53:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:08,198 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-23 19:53:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,458 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-23 19:53:08,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:53:08,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-23 19:53:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,459 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:08,459 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:53:08,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:53:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-23 19:53:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-23 19:53:08,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-23 19:53:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,463 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-23 19:53:08,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:53:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-23 19:53:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:53:08,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,464 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-23 19:53:08,464 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-23 19:53:08,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:08,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:08,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:08,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:08,723 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:53:08,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:08,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:08,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:53:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:53:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:53:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:08,756 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-23 19:53:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,833 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-23 19:53:08,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:53:08,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 19:53:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,834 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:53:08,834 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:53:08,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:53:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:53:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:53:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 19:53:08,839 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-23 19:53:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,839 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 19:53:08,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:53:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 19:53:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:53:08,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,840 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-23 19:53:08,840 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-23 19:53:08,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:08,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:09,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:09,400 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:09,417 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:53:09,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:09,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:09,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:53:09,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:53:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:53:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:09,450 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-23 19:53:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:09,499 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-23 19:53:09,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:53:09,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 19:53:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:09,500 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:53:09,500 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:53:09,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:53:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:53:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-23 19:53:09,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-23 19:53:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:09,504 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-23 19:53:09,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:53:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-23 19:53:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:53:09,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:09,505 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-23 19:53:09,505 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:09,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-23 19:53:09,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:09,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:09,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:09,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:09,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:09,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:09,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:09,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:53:09,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:53:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:53:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:09,764 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-23 19:53:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:10,033 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-23 19:53:10,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:53:10,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-23 19:53:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:10,034 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:53:10,034 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:10,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:53:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-23 19:53:10,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-23 19:53:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:10,039 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-23 19:53:10,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:53:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-23 19:53:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:53:10,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:10,039 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-23 19:53:10,040 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:10,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-23 19:53:10,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:10,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:10,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:10,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:10,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:10,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:10,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:10,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:10,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:10,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:53:10,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:53:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:53:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:10,543 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-23 19:53:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:10,642 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-23 19:53:10,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:53:10,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 19:53:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:10,643 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:10,643 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:53:10,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:53:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:53:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:53:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 19:53:10,647 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-23 19:53:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:10,647 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 19:53:10,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:53:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 19:53:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:53:10,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:10,648 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-23 19:53:10,648 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:10,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-23 19:53:10,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:10,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:10,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:10,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:11,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:11,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:11,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:53:11,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:11,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:11,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:53:11,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:53:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:53:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:11,145 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-23 19:53:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:11,279 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 19:53:11,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:53:11,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 19:53:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:11,280 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:53:11,280 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:53:11,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:53:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:53:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-23 19:53:11,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-23 19:53:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:11,284 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-23 19:53:11,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:53:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-23 19:53:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:53:11,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:11,285 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-23 19:53:11,285 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:11,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-23 19:53:11,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:11,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:11,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:11,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:11,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:11,595 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:11,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:11,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:11,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:11,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:53:11,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:53:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:53:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:11,645 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-23 19:53:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:11,951 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-23 19:53:11,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:53:11,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-23 19:53:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:11,952 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:11,952 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:53:11,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:53:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-23 19:53:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:53:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-23 19:53:11,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-23 19:53:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:11,956 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-23 19:53:11,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:53:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-23 19:53:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:53:11,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:11,956 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-23 19:53:11,957 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:11,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-23 19:53:11,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:11,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:12,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:12,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:12,213 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:12,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:12,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:12,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:53:12,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:53:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:53:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:12,245 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-23 19:53:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:12,352 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-23 19:53:12,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:53:12,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 19:53:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:12,353 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:53:12,354 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:53:12,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:53:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:53:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:53:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 19:53:12,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-23 19:53:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:12,358 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 19:53:12,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:53:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 19:53:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:53:12,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:12,359 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-23 19:53:12,359 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:12,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:12,360 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-23 19:53:12,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:12,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:12,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:12,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:12,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:12,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:12,626 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:12,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:12,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:12,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:53:12,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:53:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:53:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:12,661 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-23 19:53:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:12,743 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-23 19:53:12,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:53:12,743 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 19:53:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:12,744 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:53:12,744 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:53:12,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:53:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:53:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:53:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-23 19:53:12,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-23 19:53:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:12,750 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-23 19:53:12,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:53:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-23 19:53:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:53:12,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:12,751 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-23 19:53:12,751 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:12,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-23 19:53:12,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:12,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:12,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:12,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:13,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:13,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:13,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:13,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:53:13,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:53:13,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:53:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:13,162 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-23 19:53:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:13,603 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-23 19:53:13,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:53:13,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-23 19:53:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:13,604 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:53:13,604 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:13,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-23 19:53:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:53:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-23 19:53:13,610 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-23 19:53:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:13,610 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-23 19:53:13,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:53:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-23 19:53:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:53:13,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:13,611 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-23 19:53:13,611 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:13,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-23 19:53:13,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:13,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:13,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:13,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:13,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:13,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:13,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:13,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:13,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:13,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:53:13,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:53:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:53:13,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:13,862 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-23 19:53:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:13,944 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-23 19:53:13,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:53:13,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 19:53:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:13,945 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:53:13,945 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:53:13,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:53:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:53:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:53:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 19:53:13,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-23 19:53:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:13,949 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 19:53:13,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:53:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 19:53:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:53:13,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:13,950 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-23 19:53:13,950 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:13,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-23 19:53:13,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:13,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:13,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:14,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:14,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:14,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:14,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:14,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:14,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:53:14,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:53:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:53:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:14,306 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-23 19:53:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:14,369 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 19:53:14,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:53:14,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 19:53:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:14,370 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:53:14,370 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:53:14,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:53:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:53:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:53:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-23 19:53:14,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-23 19:53:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:14,374 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-23 19:53:14,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:53:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-23 19:53:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:53:14,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:14,375 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-23 19:53:14,375 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:14,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-23 19:53:14,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:14,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:14,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:14,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:14,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:14,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:14,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:14,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:14,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:14,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:53:14,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:53:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:53:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:14,904 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-23 19:53:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:15,599 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-23 19:53:15,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:53:15,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-23 19:53:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:15,601 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:53:15,601 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:53:15,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:53:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-23 19:53:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:53:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-23 19:53:15,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-23 19:53:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:15,605 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-23 19:53:15,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:53:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-23 19:53:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:53:15,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:15,606 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-23 19:53:15,606 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:15,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-23 19:53:15,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:15,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:15,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:15,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:15,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:15,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:15,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:53:15,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:15,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:15,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:53:15,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:53:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:53:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:15,920 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-23 19:53:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:16,489 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-23 19:53:16,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:53:16,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 19:53:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:16,490 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:53:16,490 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:53:16,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:53:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:53:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:53:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 19:53:16,493 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-23 19:53:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:16,493 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 19:53:16,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:53:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 19:53:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:53:16,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:16,494 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-23 19:53:16,494 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:16,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-23 19:53:16,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:16,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:16,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:16,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:16,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:16,730 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:16,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:53:16,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:16,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:16,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:53:16,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:53:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:53:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:16,786 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-23 19:53:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:16,850 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-23 19:53:16,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:53:16,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 19:53:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:16,852 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:53:16,852 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:53:16,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:53:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:53:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:53:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-23 19:53:16,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-23 19:53:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:16,855 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-23 19:53:16,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:53:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-23 19:53:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:53:16,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:16,856 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-23 19:53:16,856 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:16,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-23 19:53:16,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:16,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:16,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:16,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:17,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:17,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:17,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:17,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:53:17,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:53:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:53:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:17,287 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-23 19:53:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:17,716 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-23 19:53:17,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:53:17,716 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-23 19:53:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:17,717 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:53:17,718 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:53:17,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:53:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-23 19:53:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:53:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-23 19:53:17,721 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-23 19:53:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:17,722 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-23 19:53:17,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:53:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-23 19:53:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:53:17,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:17,723 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-23 19:53:17,723 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:17,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-23 19:53:17,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:17,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:17,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:17,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:17,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:17,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:18,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:18,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:18,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:18,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:18,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:53:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:53:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:53:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:18,037 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-23 19:53:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:18,151 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-23 19:53:18,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:53:18,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 19:53:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:18,152 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:53:18,152 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:53:18,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:53:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:53:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:53:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 19:53:18,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-23 19:53:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:18,157 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 19:53:18,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:53:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 19:53:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:53:18,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:18,157 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-23 19:53:18,157 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:18,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:18,158 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-23 19:53:18,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:18,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:18,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:18,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:18,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:18,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:18,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:18,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:53:18,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:18,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:18,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:18,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:53:18,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:53:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:53:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:18,983 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-23 19:53:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:19,057 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 19:53:19,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:53:19,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 19:53:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:19,058 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:19,058 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:53:19,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:53:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:53:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:53:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-23 19:53:19,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-23 19:53:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:19,063 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-23 19:53:19,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:53:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-23 19:53:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:53:19,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:19,064 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-23 19:53:19,064 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:19,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-23 19:53:19,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:19,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:19,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:19,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:19,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:19,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:19,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:19,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:53:19,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:53:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:53:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:19,549 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-23 19:53:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:20,027 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-23 19:53:20,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:53:20,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-23 19:53:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:20,028 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:53:20,028 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:53:20,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:53:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-23 19:53:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:53:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-23 19:53:20,032 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-23 19:53:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:20,032 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-23 19:53:20,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:53:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-23 19:53:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:53:20,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:20,033 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-23 19:53:20,033 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:20,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-23 19:53:20,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:20,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:20,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:20,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:20,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:20,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:20,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-23 19:53:20,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:20,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:20,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:53:20,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:53:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:53:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:20,786 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-23 19:53:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:20,941 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-23 19:53:20,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:53:20,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 19:53:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:20,941 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:53:20,942 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:53:20,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:53:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:53:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:53:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 19:53:20,944 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-23 19:53:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 19:53:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:53:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 19:53:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:53:20,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:20,945 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-23 19:53:20,945 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:20,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-23 19:53:20,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:20,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:22,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:22,013 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:22,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 19:53:22,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:22,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:22,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:53:22,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:53:22,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:53:22,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:22,074 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-23 19:53:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:22,134 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-23 19:53:22,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:53:22,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 19:53:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:22,135 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:22,135 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:53:22,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:53:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:53:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:53:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-23 19:53:22,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-23 19:53:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:22,140 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-23 19:53:22,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:53:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-23 19:53:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:53:22,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:22,140 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-23 19:53:22,141 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:22,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-23 19:53:22,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:22,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:22,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:22,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:22,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:22,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:22,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:22,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:53:22,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:53:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:53:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:22,553 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-23 19:53:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:23,075 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 19:53:23,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:53:23,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-23 19:53:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:23,077 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:53:23,077 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:53:23,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:53:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-23 19:53:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:53:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-23 19:53:23,082 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-23 19:53:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:23,082 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-23 19:53:23,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:53:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-23 19:53:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:53:23,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:23,083 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-23 19:53:23,083 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:23,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-23 19:53:23,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:23,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:23,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:23,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:23,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:23,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:23,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:23,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:23,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:23,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:53:23,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:53:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:53:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:23,960 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-23 19:53:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:24,099 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-23 19:53:24,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:53:24,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 19:53:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:24,100 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:53:24,100 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:53:24,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:53:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:53:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:53:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 19:53:24,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-23 19:53:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 19:53:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:53:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 19:53:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:53:24,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:24,106 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-23 19:53:24,106 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:24,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-23 19:53:24,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:24,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:24,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:24,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:24,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:24,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:24,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:24,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 19:53:24,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:24,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:24,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:24,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:53:24,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:53:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:53:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:24,479 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-23 19:53:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:24,543 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 19:53:24,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:53:24,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 19:53:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:24,544 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:24,544 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:53:24,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:53:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:53:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:53:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-23 19:53:24,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-23 19:53:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-23 19:53:24,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:53:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-23 19:53:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:53:24,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:24,550 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-23 19:53:24,550 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:24,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-23 19:53:24,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:24,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:24,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:24,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:24,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:24,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:25,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:25,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:25,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:25,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:25,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:53:25,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:53:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:53:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:25,076 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-23 19:53:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:25,670 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-23 19:53:25,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:53:25,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-23 19:53:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:25,671 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:53:25,671 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:53:25,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:53:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-23 19:53:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:53:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-23 19:53:25,676 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-23 19:53:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:25,676 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-23 19:53:25,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:53:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-23 19:53:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:53:25,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:25,677 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-23 19:53:25,677 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:25,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-23 19:53:25,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:25,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:25,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:25,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:26,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:26,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:26,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:26,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:53:26,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:26,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:26,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:26,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:53:26,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:53:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:53:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:26,596 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-23 19:53:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:26,729 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-23 19:53:26,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:53:26,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 19:53:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:26,731 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:53:26,731 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:26,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:53:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:53:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 19:53:26,735 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-23 19:53:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:26,736 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 19:53:26,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:53:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 19:53:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:53:26,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:26,736 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-23 19:53:26,737 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:26,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-23 19:53:26,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:26,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:26,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:26,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:27,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:27,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:27,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-23 19:53:27,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:27,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:27,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:53:27,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:53:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:53:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:27,079 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-23 19:53:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:27,152 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-23 19:53:27,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:53:27,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 19:53:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:27,153 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:27,153 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:53:27,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:53:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:53:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:53:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-23 19:53:27,157 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-23 19:53:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:27,157 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-23 19:53:27,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:53:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-23 19:53:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:53:27,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:27,158 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-23 19:53:27,158 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:27,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-23 19:53:27,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:27,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:27,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:27,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:27,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:27,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:53:27,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:53:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:53:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:27,718 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-23 19:53:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:28,346 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-23 19:53:28,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:53:28,347 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-23 19:53:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:28,347 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:53:28,348 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:53:28,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:53:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-23 19:53:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:53:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-23 19:53:28,353 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-23 19:53:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:28,353 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-23 19:53:28,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:53:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-23 19:53:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:53:28,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:28,354 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-23 19:53:28,354 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:28,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-23 19:53:28,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:28,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:28,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:28,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:28,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:28,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:28,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:28,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:28,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:28,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:53:28,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:53:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:53:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:28,879 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-23 19:53:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:29,089 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-23 19:53:29,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:53:29,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 19:53:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:29,090 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:53:29,090 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:29,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:53:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:53:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 19:53:29,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-23 19:53:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:29,095 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 19:53:29,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:53:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 19:53:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:53:29,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:29,095 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-23 19:53:29,096 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:29,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-23 19:53:29,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:29,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:29,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:30,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:30,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:30,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:53:30,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:30,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:30,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:53:30,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:53:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:53:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:30,112 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-23 19:53:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:30,192 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 19:53:30,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:53:30,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 19:53:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:30,193 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:30,193 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:53:30,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:53:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:53:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:53:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-23 19:53:30,198 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-23 19:53:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:30,198 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-23 19:53:30,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:53:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-23 19:53:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:53:30,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:30,198 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-23 19:53:30,198 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:30,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:30,199 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-23 19:53:30,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:30,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:30,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:30,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:30,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:30,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:30,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:30,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:30,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:30,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:53:30,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:53:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:53:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:30,614 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-23 19:53:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:31,446 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-23 19:53:31,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:53:31,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-23 19:53:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:31,447 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:53:31,448 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:53:31,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:53:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-23 19:53:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:53:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-23 19:53:31,453 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-23 19:53:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:31,453 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-23 19:53:31,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:53:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-23 19:53:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:53:31,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:31,454 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-23 19:53:31,454 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:31,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-23 19:53:31,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:31,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:31,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:31,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:31,746 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:53:31,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:31,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:31,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:53:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:53:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:53:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:31,778 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-23 19:53:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:31,941 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-23 19:53:31,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:53:31,941 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 19:53:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:31,942 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:53:31,942 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:31,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:53:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:53:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 19:53:31,946 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-23 19:53:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:31,946 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 19:53:31,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:53:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 19:53:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:53:31,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:31,947 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-23 19:53:31,947 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:31,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-23 19:53:31,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:31,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:31,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:31,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:32,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:32,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:32,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:32,414 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:53:32,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:32,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:32,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:32,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:53:32,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:53:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:53:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:32,452 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-23 19:53:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:32,623 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-23 19:53:32,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:53:32,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 19:53:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:32,625 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:32,625 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:53:32,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:53:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:53:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:53:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-23 19:53:32,630 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-23 19:53:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:32,630 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-23 19:53:32,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:53:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-23 19:53:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:53:32,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:32,631 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-23 19:53:32,631 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:32,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-23 19:53:32,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:32,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:32,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:32,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:33,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:33,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:33,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:33,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:53:33,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:53:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:53:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:33,439 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-23 19:53:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:34,190 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-23 19:53:34,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:53:34,191 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-23 19:53:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:34,192 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:53:34,192 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:53:34,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:53:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:53:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-23 19:53:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:53:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-23 19:53:34,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-23 19:53:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:34,196 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-23 19:53:34,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:53:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-23 19:53:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:53:34,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:34,197 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-23 19:53:34,197 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:34,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-23 19:53:34,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:34,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:34,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:34,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:34,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:34,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:34,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:34,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:34,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:34,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:34,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:34,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:34,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:53:34,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:53:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:53:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:34,608 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-23 19:53:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:34,941 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-23 19:53:34,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:53:34,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 19:53:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:34,943 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:53:34,943 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:34,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:53:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:53:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 19:53:34,947 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-23 19:53:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:34,947 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 19:53:34,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:53:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 19:53:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:53:34,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:34,948 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-23 19:53:34,948 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:34,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-23 19:53:34,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:34,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:34,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:34,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:34,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:35,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:35,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:35,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-23 19:53:35,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:35,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:35,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:53:35,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:53:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:53:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:35,377 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-23 19:53:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:35,463 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 19:53:35,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:53:35,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 19:53:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:35,464 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:53:35,464 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:53:35,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:53:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:53:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:53:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-23 19:53:35,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-23 19:53:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:35,469 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-23 19:53:35,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:53:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-23 19:53:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:53:35,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:35,469 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-23 19:53:35,469 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:35,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-23 19:53:35,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:35,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:35,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:35,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:35,941 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:35,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:35,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:36,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:36,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:53:36,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:53:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:53:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:36,025 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-23 19:53:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:37,131 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-23 19:53:37,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:53:37,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-23 19:53:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:37,133 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:53:37,133 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:53:37,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:53:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-23 19:53:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:53:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-23 19:53:37,137 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-23 19:53:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:37,138 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-23 19:53:37,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:53:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-23 19:53:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:53:37,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:37,138 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-23 19:53:37,142 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:37,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-23 19:53:37,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:37,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:37,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:37,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:37,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:37,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-23 19:53:37,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:37,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:37,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:37,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:53:37,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:53:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:53:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:37,743 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-23 19:53:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:37,955 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-23 19:53:37,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:53:37,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 19:53:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:37,957 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:53:37,957 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:53:37,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:53:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:53:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:53:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 19:53:37,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-23 19:53:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:37,962 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 19:53:37,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:53:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 19:53:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:53:37,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:37,962 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-23 19:53:37,963 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:37,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-23 19:53:37,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:37,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:37,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:37,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:38,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:38,312 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:38,349 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:53:38,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:38,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:38,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:53:38,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:53:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:53:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:38,401 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-23 19:53:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:38,599 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-23 19:53:38,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:53:38,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 19:53:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:38,600 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:53:38,600 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:53:38,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:53:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:53:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:53:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-23 19:53:38,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-23 19:53:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:38,606 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-23 19:53:38,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:53:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-23 19:53:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:53:38,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:38,606 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-23 19:53:38,606 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:38,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:38,607 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-23 19:53:38,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:38,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:38,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:38,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:39,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:39,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:39,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:39,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:53:39,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:53:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:53:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:39,363 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-23 19:53:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:40,232 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-23 19:53:40,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:53:40,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-23 19:53:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:40,233 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:53:40,234 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:53:40,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:53:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:53:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-23 19:53:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:53:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-23 19:53:40,239 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-23 19:53:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:40,239 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-23 19:53:40,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:53:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-23 19:53:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:53:40,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:40,240 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-23 19:53:40,240 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:40,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-23 19:53:40,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:40,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:40,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:40,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:40,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:40,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:40,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:40,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:40,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:40,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:53:40,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:53:40,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:53:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:40,630 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-23 19:53:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:41,860 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-23 19:53:41,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:53:41,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 19:53:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:41,861 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:53:41,861 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:53:41,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:53:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:53:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:53:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 19:53:41,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-23 19:53:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:41,866 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 19:53:41,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:53:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 19:53:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:53:41,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:41,867 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-23 19:53:41,867 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:41,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-23 19:53:41,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:41,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:41,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:41,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:41,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:42,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:42,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:42,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-23 19:53:42,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:42,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:42,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:53:42,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:53:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:53:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:42,391 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-23 19:53:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:43,189 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 19:53:43,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:53:43,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 19:53:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:43,190 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:53:43,190 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:53:43,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:53:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:53:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:53:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-23 19:53:43,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-23 19:53:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:43,195 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-23 19:53:43,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:53:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-23 19:53:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:53:43,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:43,196 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-23 19:53:43,196 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:43,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-23 19:53:43,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:43,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:43,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:43,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:43,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:43,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:43,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:43,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:43,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:53:43,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:53:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:53:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:43,831 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-23 19:53:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:44,803 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-23 19:53:44,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:53:44,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-23 19:53:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:44,804 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:53:44,804 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:53:44,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:53:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-23 19:53:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:53:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-23 19:53:44,809 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-23 19:53:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,809 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-23 19:53:44,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:53:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-23 19:53:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:53:44,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,810 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-23 19:53:44,810 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:44,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-23 19:53:44,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:45,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:45,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:46,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-23 19:53:46,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:46,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:46,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:53:46,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:53:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:53:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:46,051 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-23 19:53:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:46,264 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-23 19:53:46,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:53:46,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 19:53:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:46,265 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:53:46,265 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:53:46,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:53:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:53:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:53:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 19:53:46,271 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-23 19:53:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:46,271 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 19:53:46,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:53:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 19:53:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:53:46,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:46,272 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-23 19:53:46,272 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:46,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-23 19:53:46,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:46,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:46,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:46,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:46,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:46,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:47,053 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-23 19:53:47,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:47,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:47,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:53:47,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:53:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:53:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:47,094 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-23 19:53:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:47,201 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-23 19:53:47,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:53:47,202 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 19:53:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:47,203 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:53:47,203 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:53:47,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:53:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:53:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:53:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-23 19:53:47,210 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-23 19:53:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:47,210 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-23 19:53:47,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:53:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-23 19:53:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:53:47,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:47,211 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-23 19:53:47,211 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:47,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-23 19:53:47,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:47,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:47,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:47,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:47,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:47,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:47,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:47,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:53:47,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:53:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:53:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:47,816 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-23 19:53:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:48,997 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 19:53:48,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:53:48,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-23 19:53:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:48,999 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:53:48,999 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:53:48,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:53:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:53:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-23 19:53:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:53:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-23 19:53:49,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-23 19:53:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:49,006 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-23 19:53:49,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:53:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-23 19:53:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:53:49,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:49,007 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-23 19:53:49,007 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:49,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-23 19:53:49,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:49,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:49,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:49,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:49,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:49,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:49,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:49,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:49,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:49,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:53:49,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:53:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:53:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:49,833 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-23 19:53:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:50,092 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-23 19:53:50,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:53:50,092 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 19:53:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:50,093 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:53:50,093 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:53:50,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:53:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:53:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:53:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 19:53:50,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-23 19:53:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:50,098 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 19:53:50,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:53:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 19:53:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:53:50,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:50,098 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-23 19:53:50,099 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:50,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-23 19:53:50,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:50,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:50,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:50,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:50,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:50,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:50,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:50,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:53:50,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:50,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:50,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:50,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:53:50,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:53:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:53:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:50,604 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-23 19:53:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:50,725 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 19:53:50,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:53:50,726 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 19:53:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:50,726 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:53:50,726 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:53:50,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:53:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:53:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:53:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-23 19:53:50,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-23 19:53:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:50,732 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-23 19:53:50,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:53:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-23 19:53:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:53:50,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:50,733 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-23 19:53:50,733 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:50,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:50,733 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-23 19:53:50,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:50,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:50,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:50,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:51,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:51,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:51,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:51,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:51,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:51,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:51,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:51,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:53:51,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:53:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:53:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:51,379 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-23 19:53:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:52,688 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-23 19:53:52,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:53:52,689 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-23 19:53:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:52,690 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:53:52,690 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:53:52,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:53:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-23 19:53:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:53:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-23 19:53:52,696 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-23 19:53:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:52,696 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-23 19:53:52,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:53:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-23 19:53:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:53:52,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:52,697 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-23 19:53:52,698 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:52,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-23 19:53:52,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:52,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:52,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:53,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:53,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:53,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:53,843 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:53:53,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:53,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:53,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:53,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:53:53,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:53:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:53:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:53,899 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-23 19:53:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:54,222 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-23 19:53:54,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:53:54,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 19:53:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:54,223 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:53:54,223 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:53:54,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:53:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:53:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:53:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 19:53:54,228 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-23 19:53:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:54,228 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 19:53:54,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:53:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 19:53:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:53:54,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:54,229 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-23 19:53:54,229 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:54,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-23 19:53:54,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:54,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:54,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:54,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:54,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:54,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:54,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:54,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:53:54,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:54,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:54,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:54,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:53:54,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:53:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:53:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:54,939 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-23 19:53:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:55,045 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-23 19:53:55,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:53:55,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 19:53:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:55,047 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:53:55,047 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:53:55,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:53:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:53:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:53:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-23 19:53:55,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-23 19:53:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:55,051 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-23 19:53:55,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:53:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-23 19:53:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:53:55,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:55,052 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-23 19:53:55,052 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:55,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-23 19:53:55,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:55,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:55,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:55,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:55,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:55,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:55,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:55,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:55,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:55,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:53:55,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:53:55,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:53:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:55,737 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-23 19:53:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:57,046 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-23 19:53:57,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:53:57,046 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-23 19:53:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:57,047 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:53:57,047 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:53:57,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:53:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:53:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-23 19:53:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:53:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-23 19:53:57,051 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-23 19:53:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:57,052 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-23 19:53:57,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:53:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-23 19:53:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:53:57,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:57,052 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-23 19:53:57,053 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:57,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-23 19:53:57,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:57,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:57,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:57,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:57,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:57,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:57,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:57,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:57,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:57,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:53:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:53:57,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:53:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:57,830 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-23 19:53:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:58,172 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-23 19:53:58,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:53:58,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 19:53:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:58,173 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:53:58,173 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:53:58,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:53:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:53:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:53:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 19:53:58,180 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-23 19:53:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:58,180 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 19:53:58,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:53:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 19:53:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:53:58,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:58,181 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-23 19:53:58,181 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:58,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-23 19:53:58,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:58,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:58,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:58,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:58,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:58,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:53:58,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:58,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:58,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:58,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:53:58,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:53:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:53:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:58,743 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-23 19:53:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:58,860 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 19:53:58,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:53:58,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 19:53:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:58,862 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:53:58,862 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:53:58,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:53:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:53:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:53:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-23 19:53:58,868 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-23 19:53:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:58,868 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-23 19:53:58,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:53:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-23 19:53:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:53:58,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:58,869 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-23 19:53:58,869 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:58,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-23 19:53:58,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:58,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:58,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:58,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:59,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:59,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:59,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:59,606 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:59,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:59,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:59,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:59,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:53:59,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:53:59,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:53:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:59,652 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-23 19:54:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:00,960 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-23 19:54:00,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:54:00,961 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-23 19:54:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:00,962 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:54:00,962 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:54:00,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:54:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:54:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-23 19:54:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:54:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-23 19:54:00,967 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-23 19:54:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:00,968 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-23 19:54:00,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:54:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-23 19:54:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:54:00,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:00,968 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-23 19:54:00,969 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:00,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-23 19:54:00,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:00,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:00,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:00,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:01,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:01,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:01,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:01,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-23 19:54:01,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:01,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:01,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:01,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:54:01,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:54:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:54:01,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:01,745 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-23 19:54:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:02,297 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-23 19:54:02,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:54:02,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 19:54:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:02,298 INFO L225 Difference]: With dead ends: 102 [2018-09-23 19:54:02,299 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:54:02,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:54:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:54:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:54:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 19:54:02,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-23 19:54:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:02,304 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 19:54:02,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:54:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 19:54:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:54:02,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:02,304 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-23 19:54:02,304 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:02,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-23 19:54:02,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:02,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:02,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:02,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:02,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:02,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:02,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:02,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:02,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-23 19:54:02,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:02,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:02,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:02,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:54:02,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:54:02,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:54:02,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:02,882 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-23 19:54:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:02,980 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-23 19:54:02,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:54:02,981 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 19:54:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:02,982 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:54:02,982 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:54:02,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:54:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:54:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:54:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-23 19:54:02,986 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-23 19:54:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:02,986 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-23 19:54:02,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:54:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-23 19:54:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:54:02,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:02,987 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-23 19:54:02,987 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:02,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-23 19:54:02,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:02,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:02,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:03,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:03,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:03,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:03,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:03,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:03,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:54:03,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:54:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:54:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:03,707 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-23 19:54:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:05,121 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-23 19:54:05,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:54:05,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-23 19:54:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:05,122 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:54:05,122 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:54:05,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:54:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-23 19:54:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:54:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-23 19:54:05,128 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-23 19:54:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:05,128 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-23 19:54:05,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:54:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-23 19:54:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:54:05,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:05,129 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-23 19:54:05,129 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:05,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-23 19:54:05,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:05,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:05,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:05,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:05,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:05,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:05,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:05,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:05,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:05,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:05,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:05,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:05,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:54:05,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:54:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:54:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:05,626 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-23 19:54:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:06,867 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-23 19:54:06,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:54:06,867 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 19:54:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:06,868 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:54:06,868 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:54:06,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:54:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:54:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:54:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 19:54:06,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-23 19:54:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:06,873 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 19:54:06,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:54:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 19:54:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:54:06,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:06,874 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-23 19:54:06,874 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:06,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-23 19:54:06,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:06,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:06,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:06,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:07,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:07,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:07,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:07,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 19:54:07,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:07,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:07,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:07,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:54:07,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:54:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:54:07,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:07,624 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-23 19:54:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:07,792 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 19:54:07,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:54:07,792 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 19:54:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:07,793 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:54:07,793 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:54:07,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:54:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:54:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:54:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-23 19:54:07,799 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-23 19:54:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:07,800 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-23 19:54:07,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:54:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-23 19:54:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:54:07,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:07,800 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-23 19:54:07,801 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:07,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-23 19:54:07,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:07,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:07,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:08,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:08,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:08,732 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:08,773 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:08,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:08,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:08,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:08,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:54:08,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:54:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:54:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:08,818 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-23 19:54:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:10,135 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-23 19:54:10,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:54:10,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-23 19:54:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:10,136 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:54:10,136 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:54:10,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:54:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-23 19:54:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:54:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-23 19:54:10,142 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-23 19:54:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:10,142 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-23 19:54:10,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:54:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-23 19:54:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:54:10,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:10,142 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-23 19:54:10,143 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:10,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-23 19:54:10,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:10,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:10,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:10,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:10,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:10,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:10,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:10,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:10,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:54:10,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:10,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:10,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:10,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:54:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:54:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:54:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:10,678 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-23 19:54:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:10,994 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-23 19:54:10,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:54:10,994 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 19:54:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:10,995 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:54:10,995 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:54:10,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:54:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:54:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:54:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 19:54:11,002 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-23 19:54:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:11,002 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 19:54:11,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:54:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 19:54:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:54:11,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:11,003 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-23 19:54:11,003 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:11,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-23 19:54:11,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:11,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:11,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:11,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:11,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:11,538 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-23 19:54:11,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:11,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:11,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:11,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:54:11,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:54:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:54:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:11,572 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-23 19:54:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:11,681 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-23 19:54:11,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:54:11,682 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 19:54:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:11,682 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:54:11,683 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:54:11,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:54:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:54:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:54:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-23 19:54:11,687 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-23 19:54:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:11,687 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-23 19:54:11,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:54:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-23 19:54:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:54:11,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:11,687 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-23 19:54:11,688 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:11,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-23 19:54:11,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:11,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:11,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:11,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:12,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:12,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:12,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:12,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:12,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:12,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:54:12,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:54:12,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:54:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:12,944 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-23 19:54:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:14,335 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-23 19:54:14,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:54:14,335 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-23 19:54:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:14,336 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:54:14,336 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:54:14,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:54:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-23 19:54:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:54:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-23 19:54:14,341 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-23 19:54:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:14,341 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-23 19:54:14,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:54:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-23 19:54:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:54:14,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:14,342 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-23 19:54:14,342 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:14,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-23 19:54:14,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:14,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:14,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:14,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:14,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:14,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:14,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:14,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:14,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:14,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:14,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:14,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:14,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:54:14,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:54:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:54:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:14,877 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-23 19:54:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:15,196 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-23 19:54:15,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:54:15,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 19:54:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:15,197 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:54:15,197 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:54:15,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:54:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:54:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:54:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 19:54:15,202 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-23 19:54:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:15,202 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 19:54:15,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:54:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 19:54:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:54:15,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:15,203 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-23 19:54:15,203 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:15,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-23 19:54:15,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:15,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:15,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:15,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:15,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:15,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:15,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:15,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:15,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:54:15,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:15,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:15,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:15,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:54:15,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:54:15,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:54:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:15,946 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-23 19:54:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:16,270 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 19:54:16,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:54:16,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 19:54:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:16,271 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:54:16,271 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:54:16,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:54:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:54:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:54:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-23 19:54:16,277 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-23 19:54:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:16,277 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-23 19:54:16,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:54:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-23 19:54:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:54:16,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:16,277 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-23 19:54:16,278 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:16,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-23 19:54:16,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:16,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:16,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:16,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:16,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:16,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:16,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:16,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:17,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:17,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:17,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:17,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:17,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:54:17,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:54:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:54:17,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:17,056 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-23 19:54:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:18,704 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-23 19:54:18,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:54:18,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-23 19:54:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:18,705 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:54:18,706 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:54:18,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:54:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-23 19:54:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:54:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-23 19:54:18,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-23 19:54:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:18,711 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-23 19:54:18,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:54:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-23 19:54:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:54:18,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:18,711 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-23 19:54:18,712 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:18,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-23 19:54:18,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:18,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:18,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:18,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:19,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:19,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:19,687 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:54:19,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:19,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:19,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:19,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:54:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:54:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:54:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:19,736 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-23 19:54:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:20,074 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-23 19:54:20,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:54:20,075 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 19:54:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:20,075 INFO L225 Difference]: With dead ends: 114 [2018-09-23 19:54:20,075 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:54:20,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:54:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:54:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:54:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 19:54:20,082 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-23 19:54:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:20,082 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 19:54:20,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:54:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 19:54:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:54:20,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:20,083 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-23 19:54:20,083 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:20,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-23 19:54:20,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:20,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:20,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:20,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:20,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:20,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:20,614 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:20,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:54:20,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:20,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:20,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:20,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:54:20,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:54:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:54:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:20,702 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-23 19:54:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:20,818 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-23 19:54:20,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:54:20,819 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 19:54:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:20,819 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:54:20,820 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:54:20,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:54:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:54:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:54:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-23 19:54:20,826 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-23 19:54:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:20,826 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-23 19:54:20,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:54:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-23 19:54:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:54:20,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:20,827 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-23 19:54:20,827 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:20,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-23 19:54:20,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:20,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:20,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:20,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:21,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:21,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:21,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:21,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:21,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:21,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:54:21,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:54:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:54:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:21,945 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-23 19:54:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:23,625 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 19:54:23,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:54:23,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-23 19:54:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:23,626 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:54:23,627 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:54:23,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:54:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-23 19:54:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:54:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-23 19:54:23,633 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-23 19:54:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:23,634 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-23 19:54:23,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:54:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-23 19:54:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:54:23,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:23,634 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-23 19:54:23,635 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:23,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-23 19:54:23,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:23,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:23,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:24,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:24,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:24,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:24,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:24,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:24,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:24,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:24,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:54:24,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:54:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:54:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:24,328 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-23 19:54:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:24,686 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-23 19:54:24,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:54:24,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 19:54:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:24,687 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:54:24,687 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:54:24,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:54:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:54:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:54:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 19:54:24,693 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-23 19:54:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:24,693 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 19:54:24,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:54:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 19:54:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:54:24,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:24,693 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-23 19:54:24,694 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:24,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-23 19:54:24,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:24,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:24,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:24,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:24,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:25,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:25,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:25,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:25,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-23 19:54:25,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:25,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:25,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:25,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:54:25,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:54:25,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:54:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:25,421 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-23 19:54:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:25,536 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 19:54:25,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:54:25,536 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 19:54:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:25,537 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:54:25,537 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:54:25,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:54:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:54:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:54:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-23 19:54:25,542 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-23 19:54:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:25,542 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-23 19:54:25,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:54:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-23 19:54:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:54:25,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:25,543 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-23 19:54:25,543 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:25,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-23 19:54:25,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:25,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:25,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:26,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:26,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:26,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:26,338 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:26,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:26,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:26,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:26,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:54:26,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:54:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:54:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:26,378 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-23 19:54:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:28,060 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-23 19:54:28,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:54:28,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-23 19:54:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:28,061 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:54:28,061 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:54:28,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:54:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-23 19:54:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:54:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-23 19:54:28,067 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-23 19:54:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:28,067 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-23 19:54:28,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:54:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-23 19:54:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:54:28,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:28,067 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-23 19:54:28,068 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:28,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-23 19:54:28,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:28,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:28,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:28,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:28,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:28,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:28,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:28,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:28,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-23 19:54:28,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:28,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:28,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:28,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:54:28,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:54:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:54:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:28,698 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-23 19:54:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:29,151 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-23 19:54:29,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:54:29,152 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 19:54:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:29,152 INFO L225 Difference]: With dead ends: 120 [2018-09-23 19:54:29,152 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:54:29,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:54:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:54:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:54:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 19:54:29,158 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-23 19:54:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:29,158 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 19:54:29,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:54:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 19:54:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:54:29,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:29,159 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-23 19:54:29,159 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:29,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-23 19:54:29,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:29,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:29,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:29,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:29,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:29,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:29,804 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 19:54:29,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:29,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:29,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:29,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:54:29,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:54:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:54:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:29,859 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-23 19:54:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:30,032 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-23 19:54:30,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:54:30,033 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 19:54:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:30,033 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:54:30,033 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:54:30,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:54:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:54:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:54:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-23 19:54:30,040 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-23 19:54:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:30,040 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-23 19:54:30,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:54:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-23 19:54:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:54:30,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:30,041 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-23 19:54:30,041 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:30,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-23 19:54:30,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:30,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:30,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:30,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:30,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:30,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:30,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:30,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:30,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:30,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:30,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:54:30,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:54:30,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:54:30,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:30,916 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-23 19:54:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:32,684 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-23 19:54:32,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:54:32,684 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-23 19:54:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:32,685 INFO L225 Difference]: With dead ends: 122 [2018-09-23 19:54:32,685 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:54:32,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:54:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-23 19:54:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:54:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-23 19:54:32,692 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-23 19:54:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:32,692 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-23 19:54:32,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:54:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-23 19:54:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:54:32,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:32,693 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-23 19:54:32,693 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:32,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-23 19:54:32,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:32,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:32,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:32,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:32,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:33,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:33,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:33,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:33,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:33,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:33,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:33,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:33,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:54:33,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:54:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:54:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:33,421 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-23 19:54:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:33,843 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-23 19:54:33,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:54:33,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 19:54:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:33,844 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:54:33,845 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:54:33,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:54:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:54:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:54:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 19:54:33,850 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-23 19:54:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:33,850 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 19:54:33,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:54:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 19:54:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:54:33,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:33,851 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-23 19:54:33,851 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:33,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-23 19:54:33,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:33,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:33,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:34,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:34,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:34,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:34,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-23 19:54:34,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:34,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:34,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:34,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:54:34,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:54:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:54:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:34,594 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-23 19:54:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:34,703 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 19:54:34,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:54:34,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 19:54:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:34,704 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:54:34,704 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:54:34,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:54:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:54:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:54:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-23 19:54:34,710 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-23 19:54:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:34,710 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-23 19:54:34,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:54:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-23 19:54:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:54:34,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:34,711 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-23 19:54:34,711 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:34,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-23 19:54:34,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:34,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:34,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:34,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:34,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:35,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:35,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:35,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:35,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:35,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:35,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:35,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:35,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:54:35,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:54:35,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:54:35,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:35,632 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-09-23 19:54:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:37,460 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-23 19:54:37,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:54:37,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-09-23 19:54:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:37,461 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:54:37,461 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 19:54:37,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 19:54:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-09-23 19:54:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:54:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-23 19:54:37,468 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-09-23 19:54:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:37,468 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-23 19:54:37,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:54:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-23 19:54:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:54:37,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:37,469 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-23 19:54:37,469 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:37,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-09-23 19:54:37,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:37,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:37,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:37,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:37,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:38,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:38,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:38,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:38,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-09-23 19:54:38,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:38,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:38,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:38,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:54:38,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:54:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:54:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:38,316 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-09-23 19:54:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:38,783 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-09-23 19:54:38,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:54:38,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 19:54:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:38,784 INFO L225 Difference]: With dead ends: 126 [2018-09-23 19:54:38,784 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:54:38,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:54:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:54:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:54:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 19:54:38,789 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-09-23 19:54:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:38,790 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 19:54:38,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:54:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 19:54:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:54:38,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:38,790 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-23 19:54:38,791 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:38,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-09-23 19:54:38,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:38,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:38,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:38,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:38,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:39,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:39,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:39,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:39,495 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-23 19:54:39,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:39,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:39,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:39,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:54:39,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:54:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:54:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:39,533 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-23 19:54:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:39,645 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-23 19:54:39,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:54:39,645 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 19:54:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:39,646 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:54:39,646 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:54:39,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:54:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:54:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:54:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-09-23 19:54:39,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-09-23 19:54:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:39,651 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-09-23 19:54:39,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:54:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-09-23 19:54:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:54:39,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:39,651 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-09-23 19:54:39,652 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:39,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-09-23 19:54:39,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:39,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:39,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:39,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:39,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:40,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:40,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:40,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:40,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:40,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:40,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:54:40,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:54:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:54:40,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:40,605 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-09-23 19:54:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:42,523 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-23 19:54:42,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:54:42,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-09-23 19:54:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:42,524 INFO L225 Difference]: With dead ends: 128 [2018-09-23 19:54:42,524 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:54:42,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:42,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:54:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-09-23 19:54:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:54:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-23 19:54:42,530 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-23 19:54:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:42,530 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-23 19:54:42,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:54:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-23 19:54:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:54:42,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:42,531 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-23 19:54:42,531 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:42,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-09-23 19:54:42,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:42,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:42,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:42,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:42,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:43,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:43,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:43,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:43,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:43,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:43,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:43,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:43,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:54:43,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:54:43,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:54:43,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:43,264 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-09-23 19:54:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:43,590 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-23 19:54:43,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:54:43,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 19:54:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:43,595 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:54:43,595 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:54:43,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:54:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:54:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:54:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 19:54:43,601 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-09-23 19:54:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:43,601 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 19:54:43,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:54:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 19:54:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:54:43,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:43,602 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-23 19:54:43,602 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:43,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-09-23 19:54:43,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:43,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:43,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:43,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:43,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:44,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:44,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:44,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:44,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:54:44,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:44,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:44,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:44,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:54:44,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:54:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:54:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:44,524 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-09-23 19:54:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:44,655 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 19:54:44,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:54:44,656 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 19:54:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:44,656 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:54:44,657 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:54:44,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:54:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:54:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:54:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-09-23 19:54:44,663 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-09-23 19:54:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:44,663 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-09-23 19:54:44,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:54:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-09-23 19:54:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:54:44,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:44,664 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-09-23 19:54:44,664 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:44,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-09-23 19:54:44,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:44,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:44,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:44,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:44,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:45,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:45,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:45,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:45,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:45,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:45,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:45,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:54:45,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:54:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:54:45,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:45,685 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-09-23 19:54:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:47,693 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-09-23 19:54:47,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:54:47,694 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-09-23 19:54:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:47,694 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:54:47,694 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:54:47,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:54:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-09-23 19:54:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:54:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-23 19:54:47,702 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-09-23 19:54:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:47,702 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-23 19:54:47,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:54:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-23 19:54:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:54:47,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:47,703 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-23 19:54:47,703 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:47,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-09-23 19:54:47,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:47,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:47,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:47,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:47,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:48,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:48,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:48,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:48,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:54:48,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:48,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:48,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:48,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:54:48,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:54:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:54:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:48,521 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-09-23 19:54:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:48,930 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-23 19:54:48,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:54:48,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 19:54:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:48,932 INFO L225 Difference]: With dead ends: 132 [2018-09-23 19:54:48,932 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:54:48,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:54:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:54:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:54:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 19:54:48,939 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-09-23 19:54:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:48,939 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 19:54:48,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:54:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 19:54:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:54:48,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:48,940 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-23 19:54:48,940 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:48,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-09-23 19:54:48,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:48,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:48,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:48,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:48,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:49,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:49,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:49,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:49,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:54:49,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:49,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:49,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:49,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:54:49,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:54:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:54:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:49,760 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-23 19:54:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:49,878 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-23 19:54:49,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:54:49,879 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 19:54:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:49,880 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:54:49,880 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:54:49,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:54:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:54:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:54:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-09-23 19:54:49,886 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-09-23 19:54:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:49,887 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-09-23 19:54:49,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:54:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-09-23 19:54:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:54:49,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:49,887 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-09-23 19:54:49,887 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:49,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-09-23 19:54:49,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:49,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:49,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:49,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:49,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:50,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:50,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:50,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:51,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:51,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:51,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:54:51,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:54:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:54:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:51,073 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-09-23 19:54:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:53,203 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-23 19:54:53,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:54:53,204 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-09-23 19:54:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:53,204 INFO L225 Difference]: With dead ends: 134 [2018-09-23 19:54:53,204 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:54:53,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:54:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-09-23 19:54:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:54:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-23 19:54:53,210 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-09-23 19:54:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:53,210 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-23 19:54:53,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:54:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-23 19:54:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:54:53,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:53,211 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-23 19:54:53,211 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:53,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-09-23 19:54:53,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:53,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:53,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:53,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:53,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:53,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:53,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:53,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:53,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:53,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:53,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:54,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:54,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:54:54,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:54:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:54:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:54,042 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-09-23 19:54:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:54,438 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-09-23 19:54:54,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:54:54,441 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 19:54:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:54,441 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:54:54,441 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:54:54,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:54:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:54:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:54:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 19:54:54,446 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-09-23 19:54:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:54,446 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 19:54:54,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:54:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 19:54:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:54:54,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:54,447 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-23 19:54:54,447 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:54,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-09-23 19:54:54,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:54,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:54,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:55,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:55,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:55,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:55,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:54:55,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:55,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:55,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:55,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:54:55,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:54:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:54:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:55,325 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-09-23 19:54:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:55,452 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 19:54:55,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:54:55,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 19:54:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:55,453 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:54:55,453 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:54:55,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:54:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:54:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:54:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-09-23 19:54:55,459 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-09-23 19:54:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:55,459 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-09-23 19:54:55,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:54:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-09-23 19:54:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:54:55,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:55,459 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-09-23 19:54:55,460 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:55,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-09-23 19:54:55,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:55,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:55,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:55,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:55,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:56,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:56,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:56,450 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:56,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:56,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:56,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:56,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:56,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:54:56,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:54:56,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:54:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:56,546 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-09-23 19:54:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:58,763 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-23 19:54:58,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:54:58,764 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-09-23 19:54:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:58,764 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:54:58,765 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 19:54:58,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 19:54:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-09-23 19:54:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:54:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-23 19:54:58,770 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-23 19:54:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:58,770 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-23 19:54:58,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:54:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-23 19:54:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:54:58,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:58,771 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-23 19:54:58,771 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:58,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-09-23 19:54:58,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:58,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:58,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:58,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:58,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:59,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:59,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:59,483 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:59,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-23 19:54:59,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:59,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:59,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:59,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:54:59,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:54:59,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:54:59,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:54:59,587 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-09-23 19:55:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:00,151 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-23 19:55:00,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:55:00,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 19:55:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:00,152 INFO L225 Difference]: With dead ends: 138 [2018-09-23 19:55:00,153 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:55:00,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:55:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:55:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:55:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:55:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 19:55:00,158 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-09-23 19:55:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:00,159 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 19:55:00,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:55:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 19:55:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:55:00,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:00,159 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-23 19:55:00,159 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:00,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-09-23 19:55:00,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:00,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:00,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:00,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:00,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:00,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:00,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:00,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:00,981 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-23 19:55:00,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:00,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:01,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:01,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:55:01,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:55:01,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:55:01,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:55:01,019 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-23 19:55:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:01,160 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-23 19:55:01,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:55:01,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 19:55:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:01,161 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:55:01,162 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:55:01,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:55:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:55:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:55:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:55:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-09-23 19:55:01,168 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-09-23 19:55:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:01,168 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-09-23 19:55:01,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:55:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-09-23 19:55:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:55:01,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:01,169 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-09-23 19:55:01,169 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:01,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-09-23 19:55:01,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:01,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:01,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:02,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:02,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:02,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:02,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:02,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:02,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:55:02,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:55:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:55:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:55:02,330 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-09-23 19:55:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:04,644 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 19:55:04,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:55:04,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-09-23 19:55:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:04,645 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:55:04,645 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:55:04,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:55:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:55:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-09-23 19:55:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:55:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-23 19:55:04,652 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-09-23 19:55:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:04,652 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-23 19:55:04,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:55:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-23 19:55:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:55:04,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:04,652 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-23 19:55:04,652 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:04,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-09-23 19:55:04,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:04,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:04,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:05,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:05,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:05,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:05,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:05,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:05,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:05,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:05,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:55:05,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:55:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:55:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:05,472 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-09-23 19:55:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:06,060 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-09-23 19:55:06,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:55:06,060 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 19:55:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:06,061 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:55:06,061 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:55:06,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:55:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:55:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:55:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 19:55:06,067 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-09-23 19:55:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:06,067 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 19:55:06,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:55:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 19:55:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:55:06,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:06,068 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-23 19:55:06,068 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:06,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-09-23 19:55:06,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:06,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:06,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:06,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:06,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:06,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:06,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 19:55:06,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:06,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:06,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:06,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:55:06,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:55:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:55:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:06,975 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-09-23 19:55:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:07,105 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 19:55:07,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:55:07,106 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 19:55:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:07,106 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:55:07,106 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:55:07,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:55:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:55:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:55:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-09-23 19:55:07,113 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-09-23 19:55:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:07,113 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-09-23 19:55:07,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:55:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-09-23 19:55:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:55:07,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:07,114 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-09-23 19:55:07,114 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:07,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-09-23 19:55:07,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:07,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:07,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:07,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:07,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:08,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:08,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:08,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:08,898 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:08,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:08,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:08,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:08,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:55:08,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:55:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:55:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:08,942 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-09-23 19:55:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:11,362 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-09-23 19:55:11,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:55:11,362 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-09-23 19:55:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:11,363 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:55:11,363 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 19:55:11,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 19:55:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-09-23 19:55:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:55:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-23 19:55:11,369 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-09-23 19:55:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:11,369 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-23 19:55:11,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:55:11,369 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-23 19:55:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:55:11,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:11,370 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-23 19:55:11,370 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:11,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-09-23 19:55:11,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:11,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:11,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:11,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:11,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:12,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:12,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:12,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:12,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:55:12,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:12,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:12,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:12,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:55:12,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:55:12,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:55:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:12,252 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-09-23 19:55:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:12,637 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-09-23 19:55:12,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:55:12,638 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 19:55:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:12,638 INFO L225 Difference]: With dead ends: 144 [2018-09-23 19:55:12,638 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:55:12,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:55:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:55:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:55:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 19:55:12,645 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-09-23 19:55:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:12,645 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 19:55:12,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:55:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 19:55:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:55:12,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:12,645 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-23 19:55:12,646 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:12,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-09-23 19:55:12,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:12,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:12,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:12,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:13,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:13,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:13,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:13,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-23 19:55:13,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:13,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:13,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:13,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:55:13,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:55:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:55:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:13,612 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-23 19:55:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:13,756 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-23 19:55:13,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:55:13,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 19:55:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:13,757 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:55:13,757 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:55:13,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:55:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:55:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:55:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-09-23 19:55:13,763 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-09-23 19:55:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:13,763 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-09-23 19:55:13,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:55:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-09-23 19:55:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:55:13,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:13,764 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-09-23 19:55:13,764 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:13,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-09-23 19:55:13,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:13,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:13,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:13,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:13,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:14,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:14,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:14,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:14,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:14,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:14,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:55:14,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:55:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:55:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:14,957 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-09-23 19:55:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:17,473 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-23 19:55:17,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:55:17,474 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-09-23 19:55:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:17,474 INFO L225 Difference]: With dead ends: 146 [2018-09-23 19:55:17,474 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:55:17,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:55:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-09-23 19:55:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:55:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-09-23 19:55:17,481 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-09-23 19:55:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:17,481 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-09-23 19:55:17,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:55:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-09-23 19:55:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:55:17,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:17,482 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-23 19:55:17,482 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:17,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-09-23 19:55:17,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:17,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:17,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:17,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:17,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:18,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:18,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:18,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:18,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:18,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:18,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:18,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:18,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:55:18,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:55:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:55:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:18,375 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-09-23 19:55:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:19,016 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-23 19:55:19,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:55:19,017 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 19:55:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:19,017 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:55:19,017 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:55:19,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:55:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:55:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:55:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 19:55:19,023 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-09-23 19:55:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:19,024 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 19:55:19,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:55:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 19:55:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:55:19,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:19,024 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-23 19:55:19,024 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:19,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-09-23 19:55:19,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:19,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:19,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:19,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:19,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:19,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:19,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:55:19,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:19,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:19,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:19,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:55:19,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:55:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:55:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:19,989 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-09-23 19:55:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:20,143 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 19:55:20,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:55:20,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 19:55:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:20,144 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:55:20,144 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:55:20,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:55:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:55:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:55:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-09-23 19:55:20,151 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-09-23 19:55:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:20,151 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-09-23 19:55:20,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:55:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-09-23 19:55:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:55:20,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:20,151 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-09-23 19:55:20,151 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:20,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:20,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-09-23 19:55:20,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:20,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:20,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:20,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:20,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:21,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:21,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:21,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:21,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:21,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:21,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:21,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:21,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:55:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:55:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:55:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:21,531 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-09-23 19:55:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:24,156 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-23 19:55:24,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:55:24,157 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-09-23 19:55:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:24,157 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:55:24,157 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 19:55:24,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 19:55:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-09-23 19:55:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:55:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-23 19:55:24,164 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-09-23 19:55:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:24,164 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-23 19:55:24,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:55:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-23 19:55:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:55:24,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:24,164 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-23 19:55:24,164 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:24,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-09-23 19:55:24,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:24,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:24,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:24,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:24,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:24,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:25,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:55:25,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:25,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:25,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:25,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:55:25,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:55:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:55:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:25,127 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-09-23 19:55:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:25,813 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-09-23 19:55:25,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:55:25,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 19:55:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:25,814 INFO L225 Difference]: With dead ends: 150 [2018-09-23 19:55:25,814 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:55:25,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:55:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:55:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:55:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 19:55:25,820 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-09-23 19:55:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:25,821 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 19:55:25,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:55:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 19:55:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:55:25,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:25,821 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-23 19:55:25,821 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:25,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-09-23 19:55:25,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:25,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:25,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:25,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:25,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:26,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:26,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:26,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:26,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:55:26,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:26,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:26,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:26,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:55:26,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:55:26,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:55:26,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:26,824 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-23 19:55:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:26,992 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-23 19:55:26,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:55:26,993 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 19:55:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:26,993 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:55:26,993 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:55:26,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:55:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:55:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:55:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-09-23 19:55:27,000 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-09-23 19:55:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:27,000 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-09-23 19:55:27,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:55:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-09-23 19:55:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:55:27,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:27,001 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-09-23 19:55:27,001 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:27,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-09-23 19:55:27,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:27,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:27,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:27,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:27,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:28,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:28,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:28,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:28,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:28,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:28,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:55:28,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:55:28,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:55:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:28,281 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-09-23 19:55:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:31,022 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-23 19:55:31,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:55:31,022 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-09-23 19:55:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:31,023 INFO L225 Difference]: With dead ends: 152 [2018-09-23 19:55:31,023 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:55:31,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:55:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-09-23 19:55:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:55:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-09-23 19:55:31,030 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-09-23 19:55:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:31,030 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-09-23 19:55:31,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:55:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-09-23 19:55:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:55:31,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:31,031 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-23 19:55:31,031 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:31,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-09-23 19:55:31,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:31,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:31,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:31,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:31,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:31,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:31,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:31,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:31,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:31,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:31,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:31,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:31,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:55:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:55:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:55:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:31,991 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-09-23 19:55:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:32,688 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-09-23 19:55:32,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:55:32,688 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 19:55:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:32,689 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:55:32,689 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:55:32,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:32,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:55:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:55:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:55:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 19:55:32,697 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-09-23 19:55:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:32,697 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 19:55:32,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:55:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 19:55:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:55:32,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:32,698 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-23 19:55:32,698 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:32,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:32,698 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-09-23 19:55:32,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:32,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:32,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:32,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:32,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:33,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:33,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:33,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:33,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-23 19:55:33,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:33,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:33,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:33,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:55:33,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:55:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:55:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:33,776 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-09-23 19:55:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:33,938 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 19:55:33,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:55:33,938 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 19:55:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:33,939 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:55:33,939 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:55:33,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:55:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:55:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:55:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-09-23 19:55:33,946 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-09-23 19:55:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:33,946 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-09-23 19:55:33,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:55:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-09-23 19:55:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:55:33,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:33,947 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-09-23 19:55:33,947 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:33,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-09-23 19:55:33,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:33,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:33,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:33,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:33,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:35,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:35,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:35,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:35,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:35,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:35,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:35,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:35,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:55:35,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:55:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:55:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:35,342 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-09-23 19:55:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:38,190 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-09-23 19:55:38,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:55:38,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-09-23 19:55:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:38,192 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:55:38,192 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 19:55:38,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 19:55:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-09-23 19:55:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:55:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-23 19:55:38,199 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-23 19:55:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:38,199 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-23 19:55:38,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:55:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-23 19:55:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:55:38,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:38,200 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-23 19:55:38,200 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:38,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-09-23 19:55:38,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:38,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:38,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:38,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:38,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:39,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:39,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:39,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:39,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-23 19:55:39,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:39,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:39,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:39,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:55:39,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:55:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:55:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:39,239 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-09-23 19:55:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:39,983 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-23 19:55:39,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:55:39,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 19:55:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:39,984 INFO L225 Difference]: With dead ends: 156 [2018-09-23 19:55:39,984 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:55:39,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:55:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:55:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:55:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 19:55:39,991 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-09-23 19:55:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:39,991 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 19:55:39,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:55:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 19:55:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:55:39,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:39,991 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-23 19:55:39,991 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:39,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-09-23 19:55:39,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:39,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:39,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:39,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:39,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:40,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:40,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:40,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:41,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:55:41,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:41,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:41,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:41,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:55:41,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:55:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:55:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:41,067 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-23 19:55:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:41,224 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-23 19:55:41,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:55:41,224 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 19:55:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:41,225 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:55:41,225 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:55:41,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:55:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:55:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:55:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-09-23 19:55:41,232 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-09-23 19:55:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:41,232 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-09-23 19:55:41,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:55:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-09-23 19:55:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:55:41,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:41,233 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-09-23 19:55:41,233 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:41,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:41,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-09-23 19:55:41,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:41,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:41,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:41,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:41,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:42,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:42,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:42,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:42,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:42,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:42,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:55:42,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:55:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:55:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:42,611 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-09-23 19:55:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:45,583 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-23 19:55:45,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:55:45,584 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-09-23 19:55:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:45,585 INFO L225 Difference]: With dead ends: 158 [2018-09-23 19:55:45,585 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:55:45,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:55:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-09-23 19:55:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:55:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-23 19:55:45,591 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-09-23 19:55:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:45,592 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-23 19:55:45,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:55:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-23 19:55:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:55:45,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:45,592 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-23 19:55:45,592 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:45,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-09-23 19:55:45,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:45,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:45,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:45,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:45,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:46,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:46,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:46,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:46,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:46,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:46,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:46,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:46,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:55:46,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:55:46,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:55:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:46,644 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-09-23 19:55:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:47,116 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-09-23 19:55:47,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:55:47,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 19:55:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:47,117 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:55:47,117 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:55:47,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:55:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:55:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:55:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 19:55:47,124 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-09-23 19:55:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:47,124 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 19:55:47,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:55:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 19:55:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:55:47,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:47,124 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-23 19:55:47,125 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:47,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-09-23 19:55:47,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:47,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:47,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:47,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:48,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:48,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:48,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:48,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-23 19:55:48,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:48,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:48,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:48,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:55:48,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:55:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:55:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:48,251 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-09-23 19:55:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:48,399 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 19:55:48,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:55:48,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 19:55:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:48,400 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:55:48,400 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:55:48,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:55:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:55:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:55:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-09-23 19:55:48,406 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-09-23 19:55:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:48,406 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-09-23 19:55:48,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:55:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-09-23 19:55:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:55:48,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:48,407 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-09-23 19:55:48,407 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:48,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-09-23 19:55:48,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:48,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:49,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:49,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:49,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:49,816 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:49,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:49,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:49,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:49,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:55:49,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:55:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:55:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:49,871 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-09-23 19:55:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:52,976 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-23 19:55:52,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:55:52,976 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-09-23 19:55:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:52,977 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:55:52,977 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:55:52,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:55:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-09-23 19:55:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:55:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-23 19:55:52,986 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-09-23 19:55:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:52,987 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-23 19:55:52,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:55:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-23 19:55:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:55:52,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:52,987 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-23 19:55:52,988 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:52,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-09-23 19:55:52,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:52,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:52,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:52,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:52,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:53,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:53,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:53,994 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:54,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-09-23 19:55:54,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:54,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:54,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:54,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:55:54,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:55:54,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:55:54,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:54,125 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-09-23 19:55:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:54,974 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-09-23 19:55:54,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:55:54,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 19:55:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:54,975 INFO L225 Difference]: With dead ends: 162 [2018-09-23 19:55:54,975 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:55:54,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:55:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:55:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:55:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 19:55:54,984 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-09-23 19:55:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:54,984 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 19:55:54,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:55:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 19:55:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:55:54,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:54,985 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-23 19:55:54,985 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:54,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-09-23 19:55:54,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:54,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:54,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:54,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:54,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:56,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:56,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:56,023 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:56,105 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-23 19:55:56,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:56,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:56,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:56,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:55:56,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:55:56,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:55:56,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:56,148 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-23 19:55:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:56,300 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-23 19:55:56,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:55:56,301 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 19:55:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:56,301 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:55:56,301 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:55:56,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:55:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:55:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:55:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-09-23 19:55:56,308 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-09-23 19:55:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:56,308 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-09-23 19:55:56,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:55:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-09-23 19:55:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:55:56,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:56,309 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-09-23 19:55:56,309 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:56,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-09-23 19:55:56,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:56,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:56,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:56,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:56,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:57,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:57,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:57,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:57,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:57,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:57,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:55:57,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:55:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:55:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:57,781 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-09-23 19:56:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:00,997 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 19:56:00,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:56:00,998 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-09-23 19:56:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:00,998 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:56:00,998 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:56:00,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:56:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:56:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-09-23 19:56:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:56:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-23 19:56:01,006 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-23 19:56:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:01,006 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-23 19:56:01,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:56:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-23 19:56:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:56:01,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:01,006 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-23 19:56:01,007 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:01,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-09-23 19:56:01,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:01,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:01,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:01,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:01,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:02,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:02,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:02,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:56:02,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:56:02,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:02,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:02,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:02,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:56:02,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:56:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:56:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:02,154 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-09-23 19:56:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:02,767 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-23 19:56:02,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:56:02,768 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 19:56:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:02,768 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:56:02,769 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:56:02,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:56:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:56:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:56:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 19:56:02,774 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-09-23 19:56:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:02,775 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 19:56:02,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:56:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 19:56:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:56:02,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:02,775 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-23 19:56:02,775 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:02,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-09-23 19:56:02,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:02,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:02,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:02,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:02,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:03,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:03,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:03,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:56:03,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:56:03,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:03,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:03,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:03,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:56:03,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:56:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:56:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:03,984 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-09-23 19:56:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:04,175 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 19:56:04,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:56:04,175 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 19:56:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:04,175 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:56:04,175 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:56:04,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:56:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:56:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:56:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-09-23 19:56:04,181 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-09-23 19:56:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:04,182 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-09-23 19:56:04,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:56:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-09-23 19:56:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:56:04,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:04,182 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-09-23 19:56:04,182 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:04,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-09-23 19:56:04,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:04,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:04,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:04,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:04,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:05,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:05,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:56:05,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:56:05,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:05,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:05,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:05,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:56:05,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:56:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:56:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:05,714 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-09-23 19:56:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:09,056 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-09-23 19:56:09,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:56:09,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-09-23 19:56:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:09,057 INFO L225 Difference]: With dead ends: 167 [2018-09-23 19:56:09,058 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 19:56:09,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:56:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 19:56:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-09-23 19:56:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:56:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-23 19:56:09,064 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-09-23 19:56:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:09,064 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-23 19:56:09,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:56:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-23 19:56:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:56:09,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:09,065 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-23 19:56:09,065 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:09,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-09-23 19:56:09,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:09,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:09,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:09,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:09,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:10,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:10,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:10,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:10,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:56:10,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:10,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:10,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:10,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:56:10,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:56:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:56:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:10,269 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-09-23 19:56:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:11,134 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-09-23 19:56:11,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:56:11,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 19:56:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:11,135 INFO L225 Difference]: With dead ends: 168 [2018-09-23 19:56:11,135 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:56:11,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:56:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:56:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:56:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 19:56:11,142 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-09-23 19:56:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:11,142 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 19:56:11,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:56:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 19:56:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:56:11,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:11,143 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-23 19:56:11,143 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:11,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-09-23 19:56:11,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:11,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:11,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:11,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:11,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:12,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:12,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:12,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:56:12,963 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:56:12,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:12,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:13,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:13,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:56:13,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:56:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:56:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:13,006 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-23 19:56:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:13,183 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-09-23 19:56:13,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:56:13,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 19:56:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:13,184 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:56:13,184 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:56:13,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:56:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:56:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:56:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-09-23 19:56:13,191 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-09-23 19:56:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:13,191 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-09-23 19:56:13,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:56:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-09-23 19:56:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:56:13,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:13,191 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-09-23 19:56:13,191 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:13,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-09-23 19:56:13,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:13,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:13,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:13,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:13,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:14,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:14,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:14,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:14,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:14,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:14,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:56:14,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:56:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:56:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:14,773 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-09-23 19:56:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:18,229 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-23 19:56:18,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:56:18,229 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-09-23 19:56:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:18,230 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:56:18,230 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:56:18,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:56:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:56:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-09-23 19:56:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:56:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-09-23 19:56:18,240 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-09-23 19:56:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:18,241 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-09-23 19:56:18,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:56:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-09-23 19:56:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:56:18,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:18,241 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-23 19:56:18,241 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:18,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:18,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-09-23 19:56:18,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:18,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:18,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:18,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:18,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:19,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:19,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:19,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:56:19,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:56:19,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:19,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:19,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:19,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:56:19,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:56:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:56:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:19,445 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-09-23 19:56:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:19,972 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-09-23 19:56:19,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:56:19,972 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 19:56:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:19,973 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:56:19,973 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:56:19,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:56:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:56:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:56:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 19:56:19,980 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-09-23 19:56:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:19,980 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 19:56:19,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:56:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 19:56:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:56:19,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:19,981 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-23 19:56:19,981 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:19,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-09-23 19:56:19,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:19,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:19,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:21,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:21,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:21,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:56:21,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:56:21,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:21,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:21,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:21,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:56:21,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:56:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:56:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:21,279 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-09-23 19:56:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:21,445 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 19:56:21,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:56:21,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 19:56:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:21,446 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:56:21,447 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:56:21,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:56:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 19:56:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:56:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-09-23 19:56:21,457 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-09-23 19:56:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:21,457 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-09-23 19:56:21,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:56:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-09-23 19:56:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:56:21,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:21,458 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-09-23 19:56:21,458 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:21,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-09-23 19:56:21,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:21,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:21,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:21,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:21,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:22,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:22,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:22,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:56:23,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:56:23,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:23,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:23,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:23,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:56:23,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:56:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:56:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:23,122 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-09-23 19:56:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:26,730 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-23 19:56:26,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:56:26,730 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-09-23 19:56:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:26,731 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:56:26,731 INFO L226 Difference]: Without dead ends: 170 [2018-09-23 19:56:26,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-23 19:56:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-09-23 19:56:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:56:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-23 19:56:26,739 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-09-23 19:56:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:26,740 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-23 19:56:26,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:56:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-23 19:56:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:56:26,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:26,740 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-23 19:56:26,740 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:26,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-09-23 19:56:26,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:26,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:26,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:27,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:27,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:27,866 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:27,964 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-09-23 19:56:27,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:27,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:28,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:28,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:56:28,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:56:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:56:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:28,008 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-09-23 19:56:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:28,388 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-23 19:56:28,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:56:28,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 19:56:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:28,389 INFO L225 Difference]: With dead ends: 174 [2018-09-23 19:56:28,389 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:56:28,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:56:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:56:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:56:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 19:56:28,399 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-09-23 19:56:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:28,399 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 19:56:28,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:56:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 19:56:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:56:28,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:28,400 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-23 19:56:28,400 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:28,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-09-23 19:56:28,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:28,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:28,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:29,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:29,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:29,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:56:29,693 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-23 19:56:29,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:29,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:29,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:29,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:56:29,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:56:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:56:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:29,737 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-23 19:56:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:29,916 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-09-23 19:56:29,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:56:29,916 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 19:56:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:29,917 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:56:29,917 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:56:29,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:56:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 19:56:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:56:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-09-23 19:56:29,925 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-09-23 19:56:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:29,925 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-09-23 19:56:29,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:56:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-09-23 19:56:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 19:56:29,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:29,925 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-09-23 19:56:29,926 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:29,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-09-23 19:56:29,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:29,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:29,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:29,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:31,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:31,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:31,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:31,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:31,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:31,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:56:31,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:56:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:56:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:31,602 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-09-23 19:56:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:35,317 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-23 19:56:35,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:56:35,318 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-09-23 19:56:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:35,318 INFO L225 Difference]: With dead ends: 176 [2018-09-23 19:56:35,318 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:56:35,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:56:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-09-23 19:56:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 19:56:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-23 19:56:35,326 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-09-23 19:56:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:35,327 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-23 19:56:35,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:56:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-23 19:56:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:56:35,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:35,327 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-23 19:56:35,327 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:35,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-09-23 19:56:35,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:35,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:35,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:35,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:35,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:36,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:36,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:36,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:56:36,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:56:36,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:36,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:36,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:36,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:56:36,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:56:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:56:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:36,594 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-09-23 19:56:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:37,156 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-09-23 19:56:37,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:56:37,156 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 19:56:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:37,157 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:56:37,157 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:56:37,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:56:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:56:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:56:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 19:56:37,167 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-09-23 19:56:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:37,167 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 19:56:37,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:56:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 19:56:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:56:37,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:37,168 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-23 19:56:37,168 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:37,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-09-23 19:56:37,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:37,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:37,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:37,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:37,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:38,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:38,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:38,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:56:38,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 19:56:38,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:38,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:38,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:38,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:56:38,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:56:38,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:56:38,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:38,540 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-09-23 19:56:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:38,724 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 19:56:38,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:56:38,725 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 19:56:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:38,725 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:56:38,726 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:56:38,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:56:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 19:56:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 19:56:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-09-23 19:56:38,733 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-09-23 19:56:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:38,733 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-09-23 19:56:38,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:56:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-09-23 19:56:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 19:56:38,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:38,733 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-09-23 19:56:38,734 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:38,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-09-23 19:56:38,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:38,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:38,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:38,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:38,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:40,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:40,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:40,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:56:40,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:56:40,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:40,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:40,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:40,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:56:40,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:56:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:56:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:40,468 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-09-23 19:56:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:44,323 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-09-23 19:56:44,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:56:44,323 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-09-23 19:56:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:44,324 INFO L225 Difference]: With dead ends: 179 [2018-09-23 19:56:44,324 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 19:56:44,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 19:56:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-09-23 19:56:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 19:56:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-23 19:56:44,332 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-09-23 19:56:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:44,332 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-23 19:56:44,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:56:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-23 19:56:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:56:44,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:44,333 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-23 19:56:44,333 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:44,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-09-23 19:56:44,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:44,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:44,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:44,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:44,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:45,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:45,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:45,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:45,619 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:56:45,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:45,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:45,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:45,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:56:45,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:56:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:56:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:45,684 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-09-23 19:56:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:46,199 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-23 19:56:46,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:56:46,199 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 19:56:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:46,200 INFO L225 Difference]: With dead ends: 180 [2018-09-23 19:56:46,200 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:56:46,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:56:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:56:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:56:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 19:56:46,208 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-09-23 19:56:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:46,208 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 19:56:46,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:56:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 19:56:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:56:46,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:46,209 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-23 19:56:46,209 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:46,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-09-23 19:56:46,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:46,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:46,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:46,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:47,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:47,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:47,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:56:47,565 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-23 19:56:47,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:47,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:47,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:47,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:56:47,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:56:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:56:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:47,611 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-23 19:56:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:47,799 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-09-23 19:56:47,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:56:47,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 19:56:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:47,800 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:56:47,800 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 19:56:47,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 19:56:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-23 19:56:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 19:56:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-09-23 19:56:47,808 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-09-23 19:56:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:47,808 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-09-23 19:56:47,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:56:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-09-23 19:56:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 19:56:47,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:47,809 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-09-23 19:56:47,809 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:47,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-09-23 19:56:47,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:47,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:47,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:47,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:47,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:56:48,127 WARN L186 SmtUtils]: Removed 1 from assertion stack [2018-09-23 19:56:48,127 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:56:48,132 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:56:48,132 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:56:48 BoogieIcfgContainer [2018-09-23 19:56:48,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:56:48,133 INFO L168 Benchmark]: Toolchain (without parser) took 235296.71 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -200.3 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 441.3 MB). Peak memory consumption was 241.0 MB. Max. memory is 7.1 GB. [2018-09-23 19:56:48,135 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:56:48,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:56:48,135 INFO L168 Benchmark]: Boogie Preprocessor took 26.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:56:48,136 INFO L168 Benchmark]: RCFGBuilder took 268.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-09-23 19:56:48,136 INFO L168 Benchmark]: TraceAbstraction took 234953.43 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -200.3 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 420.1 MB). Peak memory consumption was 219.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:56:48,138 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 234953.43 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -200.3 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 420.1 MB). Peak memory consumption was 219.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 5. - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 5. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 234.8s OverallTime, 172 OverallIterations, 57 TraceHistogramMax, 108.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 687 SDtfs, 1599 SDslu, 6279 SDs, 0 SdLazy, 161993 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20333 GetRequests, 15149 SyntacticMatches, 112 SemanticMatches, 5072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 102.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 171 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 108.1s InterpolantComputationTime, 21071 NumberOfCodeBlocks, 21071 NumberOfCodeBlocksAsserted, 1641 NumberOfCheckSat, 20732 ConstructedInterpolants, 0 QuantifiedInterpolants, 6983148 SizeOfPredicates, 112 NumberOfNonLiveVariables, 45612 ConjunctsInSsa, 13272 ConjunctsInUnsatCore, 339 InterpolantComputations, 3 PerfectInterpolantSequences, 130033/376881 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-56-48-147.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-56-48-147.csv Completed graceful shutdown