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/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:15:21,835 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:15:21,837 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:15:21,848 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:15:21,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:15:21,850 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:15:21,851 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:15:21,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:15:21,854 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:15:21,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:15:21,856 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:15:21,856 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:15:21,858 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:15:21,859 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:15:21,861 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:15:21,861 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:15:21,862 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:15:21,864 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:15:21,866 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:15:21,867 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:15:21,868 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:15:21,870 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:15:21,872 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:15:21,880 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 [2018-09-28 10:15:21,905 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:15:21,905 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:15:21,906 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:15:21,906 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:15:21,906 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:15:21,907 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:15:21,907 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:15:21,907 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:15:21,907 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:15:21,907 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:15:21,908 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:15:21,908 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:15:21,908 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:15:21,908 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:15:21,908 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:15:21,909 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:15:21,909 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:15:21,909 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:15:21,909 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:15:21,909 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:15:21,910 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:15:21,910 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:15:21,910 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:15:21,910 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:15:21,910 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:15:21,911 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:15:21,911 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:15:21,911 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:15:21,911 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:15:21,911 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:15:21,982 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:15:21,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:15:22,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:15:22,004 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:15:22,004 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:15:22,005 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-09-28 10:15:22,005 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-09-28 10:15:22,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:15:22,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:15:22,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:15:22,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:15:22,057 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:15:22,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,096 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:15:22,096 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:15:22,097 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:15:22,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:15:22,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:15:22,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:15:22,100 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:15:22,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/1) ... [2018-09-28 10:15:22,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:15:22,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:15:22,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:15:22,125 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:15:22,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (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 [2018-09-28 10:15:22,207 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:15:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:15:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:15:22,390 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:15:22,391 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:15:22 BoogieIcfgContainer [2018-09-28 10:15:22,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:15:22,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:15:22,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:15:22,396 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:15:22,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:22" (1/2) ... [2018-09-28 10:15:22,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1c906b and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:15:22, skipping insertion in model container [2018-09-28 10:15:22,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:15:22" (2/2) ... [2018-09-28 10:15:22,400 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-09-28 10:15:22,410 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:15:22,418 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:15:22,467 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:15:22,468 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:15:22,468 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:15:22,468 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:15:22,468 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:15:22,468 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:15:22,468 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:15:22,469 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:15:22,469 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:15:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:15:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:15:22,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:22,489 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:15:22,490 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:22,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-28 10:15:22,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:22,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:22,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:22,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,660 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:15:22,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:15:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:15:22,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:15:22,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:15:22,680 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:15:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:22,716 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-28 10:15:22,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:15:22,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:15:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:22,729 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:15:22,730 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:15:22,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:15:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:15:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:15:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:15:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:15:22,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:15:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:22,770 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:15:22,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:15:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:15:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:15:22,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:22,771 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:15:22,771 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:22,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-28 10:15:22,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:22,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:22,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:22,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:22,919 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 [2018-09-28 10:15:22,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:15:23,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:15:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:15:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:15:23,017 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:15:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,054 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:15:23,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:15:23,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:15:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,055 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:15:23,056 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:15:23,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:15:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:15:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:15:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:15:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:15:23,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:15:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,060 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:15:23,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:15:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:15:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:15:23,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,061 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:15:23,061 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-28 10:15:23,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:23,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,157 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 [2018-09-28 10:15:23,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:23,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:23,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:23,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:15:23,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:15:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:15:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:15:23,216 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:15:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,245 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:15:23,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:15:23,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:15:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,246 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:15:23,246 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:15:23,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:15:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:15:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:15:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:15:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:15:23,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:15:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:15:23,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:15:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:15:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:15:23,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,252 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:15:23,253 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-28 10:15:23,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,385 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) [2018-09-28 10:15:23,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:23,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:15:23,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:23,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:15:23,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:15:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:15:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:15:23,457 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:15:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,517 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:15:23,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:15:23,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:15:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,518 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:15:23,518 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:15:23,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:15:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:15:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:15:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:15:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:15:23,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:15:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,522 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:15:23,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:15:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:15:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:15:23,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,523 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:15:23,523 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-28 10:15:23,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:23,837 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:23,854 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:23,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:23,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:15:23,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:15:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:15:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:15:23,885 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:15:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,924 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:15:23,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:15:23,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:15:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,925 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:15:23,925 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:15:23,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:15:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:15:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:15:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:15:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:15:23,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:15:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,930 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:15:23,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:15:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:15:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:15:23,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,931 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:15:23,931 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-28 10:15:23,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:24,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:24,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:15:24,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:24,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:15:24,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:15:24,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:15:24,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:15:24,146 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:15:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,190 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:15:24,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:15:24,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:15:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,191 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:15:24,192 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:15:24,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:15:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:15:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:15:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:15:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:15:24,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:15:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,196 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:15:24,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:15:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:15:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:15:24,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,196 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:15:24,197 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-28 10:15:24,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:24,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:24,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:24,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:15:24,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:24,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:24,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:24,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:24,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:24,448 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:15:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,486 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:15:24,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:24,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:15:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,487 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:15:24,487 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:15:24,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:15:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:15:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:15:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:15:24,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:15:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,492 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:15:24,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:15:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:15:24,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,493 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:15:24,493 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-28 10:15:24,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,611 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 [2018-09-28 10:15:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:24,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,686 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:15:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,923 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:15:24,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:24,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:15:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,925 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:15:24,925 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:15:24,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:15:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:15:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:15:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:15:24,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:15:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,932 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:15:24,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:15:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:15:24,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,933 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:15:24,933 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-28 10:15:24,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:24,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:25,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:25,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:25,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:25,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:15:25,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:15:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:15:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:15:25,233 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:15:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,269 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:15:25,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:15:25,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:15:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,271 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:15:25,271 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:15:25,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:15:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:15:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:15:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:15:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:15:25,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:15:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,276 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:15:25,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:15:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:15:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:15:25,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,277 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:15:25,277 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-28 10:15:25,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:25,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:25,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:25,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:15:25,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:25,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:15:25,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:15:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:15:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:15:25,528 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:15:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,563 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:15:25,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:15:25,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:15:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,564 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:15:25,565 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:15:25,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:15:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:15:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:15:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:15:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:15:25,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:15:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,569 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:15:25,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:15:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:15:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:15:25,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,570 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:15:25,570 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-28 10:15:25,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:25,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:25,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:25,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:25,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:15:25,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:15:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:15:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:15:25,854 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:15:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,907 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:15:25,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:15:25,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:15:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,910 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:15:25,910 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:15:25,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:15:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:15:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:15:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:15:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:15:25,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:15:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,915 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:15:25,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:15:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:15:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:15:25,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,916 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:15:25,916 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-28 10:15:25,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:25,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,252 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 [2018-09-28 10:15:26,263 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:26,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:15:26,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:26,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:26,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:15:26,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:15:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:15:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:15:26,314 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:15:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,354 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:15:26,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:15:26,355 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:15:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,355 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:15:26,355 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:15:26,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:15:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:15:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:15:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:15:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:15:26,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:15:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,361 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:15:26,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:15:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:15:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:26,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,363 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:15:26,363 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-28 10:15:26,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,587 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 [2018-09-28 10:15:26,594 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:26,607 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:15:26,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:26,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:26,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:15:26,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:15:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:15:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:15:26,644 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:15:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,683 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:15:26,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:15:26,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:15:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,685 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:15:26,685 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:15:26,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:15:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:15:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:15:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:15:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:15:26,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:15:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,690 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:15:26,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:15:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:15:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:15:26,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,691 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:15:26,691 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-28 10:15:26,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:26,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:27,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:15:27,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:15:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:15:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:15:27,014 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:15:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,254 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:15:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:15:27,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:15:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,255 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:15:27,255 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:15:27,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:15:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:15:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:15:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:15:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:15:27,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:15:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:27,265 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:15:27,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:15:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:15:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:27,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:27,266 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:15:27,267 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:27,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-28 10:15:27,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:27,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:27,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:27,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:27,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:27,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:27,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:27,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:27,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:15:27,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:15:27,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:15:27,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:15:27,623 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:15:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,693 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:15:27,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:15:27,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:15:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,694 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:15:27,694 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:15:27,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:15:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:15:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:15:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:15:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:15:27,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:15:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:27,698 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:15:27,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:15:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:15:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:15:27,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:27,699 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:15:27,699 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:27,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-28 10:15:27,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:27,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:27,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:27,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:28,181 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 [2018-09-28 10:15:28,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:28,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:15:28,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:28,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:28,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:15:28,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:15:28,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:15:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:15:28,247 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:15:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:28,283 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:15:28,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:15:28,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:15:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:28,284 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:15:28,284 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:15:28,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:15:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:15:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:15:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:15:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:15:28,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:15:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:28,290 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:15:28,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:15:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:15:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:15:28,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:28,290 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:15:28,291 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:28,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-28 10:15:28,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:28,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:28,871 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 [2018-09-28 10:15:28,878 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:28,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:28,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:28,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:28,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:15:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:15:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:15:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:15:28,955 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:15:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,053 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:15:29,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:15:29,054 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:15:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,054 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:15:29,054 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:15:29,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:15:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:15:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:15:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:15:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:15:29,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:15:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:29,059 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:15:29,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:15:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:15:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:15:29,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:29,060 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:15:29,060 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:29,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-28 10:15:29,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:29,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:29,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:29,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:29,550 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:15:29,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:29,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:29,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:15:29,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:15:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:15:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:15:29,602 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:15:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,742 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:15:29,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:15:29,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:15:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,743 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:15:29,743 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:15:29,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:15:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:15:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:15:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:15:29,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:15:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:29,748 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:15:29,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:15:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:15:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:15:29,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:29,749 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:15:29,749 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:29,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-28 10:15:29,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:29,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:29,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:29,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:29,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:30,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:15:30,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:30,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:15:30,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:15:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:15:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:15:30,050 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:15:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,085 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:15:30,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:15:30,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:15:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,087 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:15:30,087 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:15:30,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:15:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:15:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:15:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:15:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:15:30,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:15:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,091 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:15:30,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:15:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:15:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:15:30,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,092 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:15:30,092 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-28 10:15:30,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:30,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,369 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 [2018-09-28 10:15:30,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:15:30,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:15:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:15:30,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:15:30,429 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:15:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,475 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:15:30,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:15:30,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:15:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,476 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:15:30,476 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:15:30,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:15:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:15:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:15:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:15:30,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:15:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,481 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:15:30,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:15:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:15:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:15:30,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,482 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:15:30,482 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-28 10:15:30,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:30,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:30,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:30,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:30,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:30,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:15:30,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:15:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:15:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:15:30,981 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:15:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:31,139 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:15:31,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:15:31,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:15:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:31,140 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:15:31,140 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:15:31,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:15:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:15:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:15:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:15:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:15:31,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:15:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:31,144 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:15:31,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:15:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:15:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:15:31,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:31,145 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:15:31,146 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:31,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-28 10:15:31,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:31,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:31,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:31,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:31,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:31,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:31,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:15:31,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:31,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:31,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:15:31,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:15:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:15:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:15:31,539 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:15:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:31,608 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:15:31,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:15:31,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:15:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:31,611 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:15:31,611 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:15:31,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:15:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:15:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:15:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:15:31,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:15:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:31,616 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:15:31,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:15:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:15:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:15:31,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:31,617 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:15:31,617 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:31,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-28 10:15:31,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:31,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:31,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:31,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:32,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:32,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:32,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:32,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:32,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:15:32,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:15:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:15:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:15:32,156 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:15:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,231 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:15:32,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:15:32,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:15:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,232 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:15:32,232 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:15:32,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:15:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:15:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:15:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:15:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:15:32,236 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:15:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,236 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:15:32,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:15:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:15:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:15:32,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,237 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:15:32,237 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-28 10:15:32,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:32,629 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 [2018-09-28 10:15:32,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:32,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:15:32,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:32,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:15:32,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:15:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:15:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:15:32,702 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:15:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,770 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:15:32,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:15:32,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:15:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,771 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:15:32,771 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:15:32,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:15:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:15:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:15:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:15:32,777 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:15:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,777 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:15:32,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:15:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:15:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:15:32,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,778 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:15:32,779 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-28 10:15:32,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:33,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:33,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:33,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:15:33,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:33,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:33,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:15:33,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:15:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:15:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:15:33,815 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:15:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:33,879 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:15:33,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:15:33,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:15:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:33,880 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:15:33,880 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:15:33,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:15:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:15:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:15:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:15:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:15:33,886 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:15:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:33,887 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:15:33,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:15:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:15:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:15:33,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:33,888 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:15:33,888 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:33,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:33,888 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-28 10:15:33,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:33,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:33,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:33,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,445 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 [2018-09-28 10:15:34,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:34,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:15:34,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:15:34,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:15:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:15:34,503 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:15:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:34,585 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:15:34,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:15:34,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:15:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:34,586 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:15:34,586 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:15:34,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:15:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:15:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:15:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:15:34,590 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:15:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:34,590 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:15:34,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:15:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:15:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:15:34,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:34,591 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:15:34,591 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:34,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-28 10:15:34,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:34,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:34,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:34,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:35,428 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 [2018-09-28 10:15:35,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:35,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:35,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:35,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:35,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:15:35,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:15:35,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:15:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:15:35,495 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:15:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:35,682 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:15:35,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:15:35,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:15:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:35,683 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:15:35,683 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:15:35,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:15:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:15:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:15:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:15:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:15:35,688 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:15:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:35,688 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:15:35,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:15:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:15:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:15:35,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:35,689 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:15:35,689 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:35,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-28 10:15:35,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:35,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:35,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:35,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,058 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 [2018-09-28 10:15:36,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:36,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:15:36,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:36,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:15:36,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:15:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:15:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:15:36,129 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:15:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,165 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:15:36,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:15:36,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:15:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,166 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:15:36,166 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:15:36,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:15:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:15:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:15:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:15:36,171 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:15:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:36,171 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:15:36,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:15:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:15:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:15:36,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:36,172 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:15:36,173 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:36,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-28 10:15:36,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:36,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:36,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:36,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:36,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:36,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:36,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:36,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:15:36,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:15:36,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:15:36,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:15:36,718 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:15:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,791 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:15:36,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:15:36,791 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:15:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,792 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:36,792 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:15:36,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:15:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:15:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:15:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:15:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:15:36,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:15:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:36,797 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:15:36,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:15:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:15:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:15:36,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:36,798 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:15:36,798 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:36,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-28 10:15:36,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:36,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:37,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:37,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:37,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:15:37,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:37,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:37,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:15:37,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:15:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:15:37,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:15:37,281 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:15:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:37,502 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:15:37,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:15:37,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:15:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:37,503 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:15:37,503 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:15:37,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:15:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:15:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:15:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:15:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:15:37,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:15:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:37,508 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:15:37,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:15:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:15:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:15:37,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:37,508 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:15:37,509 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:37,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-28 10:15:37,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:37,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:37,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:37,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:38,873 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 [2018-09-28 10:15:38,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:38,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:15:38,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:38,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:38,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:15:38,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:15:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:15:38,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:15:38,960 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:15:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:39,039 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:15:39,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:15:39,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:15:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:39,040 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:39,041 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:39,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:15:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:15:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:15:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:15:39,045 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:15:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:15:39,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:15:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:15:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:15:39,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:39,046 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:15:39,047 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:39,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-28 10:15:39,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:39,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:39,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:39,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:39,603 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 [2018-09-28 10:15:39,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:39,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:15:39,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:15:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:15:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:15:39,673 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:15:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:39,908 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:15:39,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:15:39,909 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:15:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:39,909 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:15:39,909 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:15:39,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:15:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:15:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:15:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:15:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:15:39,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:15:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:39,914 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:15:39,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:15:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:15:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:15:39,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:39,915 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:15:39,915 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:39,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-28 10:15:39,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:39,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:39,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:39,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:40,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:40,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:40,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:40,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:40,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:40,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:40,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:40,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:15:40,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:15:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:15:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:15:40,574 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:15:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:40,631 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:15:40,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:15:40,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:15:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:40,633 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:40,633 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:40,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:15:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:15:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:15:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:15:40,637 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:15:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:40,637 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:15:40,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:15:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:15:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:15:40,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:40,638 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:15:40,638 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:40,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-28 10:15:40,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:40,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:40,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:40,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:41,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:41,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:41,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:15:41,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:41,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:41,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:15:41,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:15:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:15:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:15:41,209 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:15:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:41,261 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:15:41,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:15:41,261 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:15:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:41,262 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:15:41,262 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:15:41,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:15:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:15:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:15:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:15:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:15:41,265 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:15:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:41,265 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:15:41,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:15:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:15:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:15:41,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:41,266 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:15:41,266 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:41,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-28 10:15:41,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:41,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:41,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:41,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:41,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:41,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:41,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:41,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:15:41,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:15:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:15:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:15:41,941 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:15:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:42,027 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:15:42,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:15:42,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:15:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:42,029 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:42,029 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:42,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:15:42,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:15:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:15:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:15:42,032 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:15:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:42,033 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:15:42,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:15:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:15:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:15:42,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:42,033 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:15:42,034 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:42,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:42,034 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-28 10:15:42,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:42,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:42,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:42,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:42,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:42,598 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 [2018-09-28 10:15:42,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:42,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:15:42,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:42,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:42,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:42,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:15:42,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:15:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:15:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:15:42,669 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:15:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:42,746 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:15:42,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:15:42,746 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:15:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:42,747 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:15:42,747 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:15:42,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:15:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:15:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:15:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:15:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:15:42,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:15:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:42,750 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:15:42,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:15:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:15:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:15:42,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:42,751 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:15:42,751 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:42,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-28 10:15:42,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:42,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:42,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:42,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:44,007 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 [2018-09-28 10:15:44,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:44,044 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:15:44,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:44,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:44,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:15:44,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:15:44,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:15:44,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:15:44,089 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:15:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:44,604 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:15:44,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:15:44,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:15:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:44,605 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:44,605 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:44,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:15:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:15:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:15:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:15:44,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:15:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:44,608 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:15:44,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:15:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:15:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:15:44,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:44,609 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:15:44,609 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:44,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-28 10:15:44,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:44,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:44,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:44,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:45,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:45,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:45,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:45,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:15:45,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:15:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:15:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:15:45,249 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:15:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:45,341 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:15:45,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:15:45,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:15:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:45,342 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:15:45,342 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:15:45,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:15:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:15:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:15:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:15:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:15:45,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:15:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:45,346 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:15:45,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:15:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:15:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:15:45,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:45,347 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:15:45,347 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:45,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-28 10:15:45,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:45,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:45,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:45,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:45,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:45,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:46,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:46,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:46,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:46,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:15:46,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:15:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:15:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:15:46,052 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:15:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:46,136 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:15:46,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:15:46,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:15:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:46,137 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:46,137 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:46,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:15:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:15:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:15:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:15:46,141 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:15:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,141 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:15:46,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:15:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:15:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:15:46,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,142 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:15:46,143 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-28 10:15:46,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:46,768 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 [2018-09-28 10:15:46,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:46,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:15:46,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:46,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:46,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:15:46,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:15:46,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:15:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:15:46,841 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:15:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:46,909 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:15:46,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:15:46,910 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:15:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:46,911 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:15:46,911 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:15:46,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:15:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:15:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:15:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:15:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:15:46,914 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:15:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,914 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:15:46,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:15:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:15:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:15:46,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,915 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:15:46,915 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-28 10:15:46,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:47,712 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 [2018-09-28 10:15:47,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:47,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:47,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:47,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:47,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:15:47,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:15:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:15:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:15:47,787 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:15:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:47,890 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:15:47,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:15:47,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:15:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:47,891 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:47,891 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:47,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:15:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:15:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:15:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:15:47,895 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:15:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:47,895 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:15:47,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:15:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:15:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:15:47,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:47,896 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:15:47,896 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:47,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-28 10:15:47,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:47,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:47,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:47,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:49,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:49,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:49,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:49,081 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:15:49,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:49,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:49,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:49,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:15:49,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:15:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:15:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:15:49,121 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:15:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:49,181 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:15:49,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:15:49,182 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:15:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:49,183 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:15:49,183 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:15:49,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:15:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:15:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:15:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:15:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:15:49,185 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:15:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:49,185 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:15:49,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:15:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:15:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:15:49,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:49,186 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:15:49,186 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:49,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-28 10:15:49,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:49,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:49,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:49,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:49,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:50,266 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 [2018-09-28 10:15:50,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:50,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:15:50,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:50,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:50,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:15:50,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:15:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:15:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:15:50,344 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:15:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:50,416 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:15:50,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:15:50,417 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:15:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:50,417 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:50,417 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:50,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:15:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:15:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:15:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:15:50,422 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:15:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:50,422 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:15:50,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:15:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:15:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:15:50,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:50,423 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:15:50,423 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:50,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-28 10:15:50,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:50,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:51,236 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 [2018-09-28 10:15:51,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:51,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:15:51,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:15:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:15:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:15:51,303 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:15:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:51,441 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:15:51,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:15:51,441 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:15:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:51,442 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:15:51,442 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:15:51,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:15:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:15:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:15:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:15:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:15:51,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:15:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:51,446 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:15:51,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:15:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:15:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:15:51,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:51,447 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:15:51,447 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:51,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:51,447 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-28 10:15:51,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:51,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:51,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:51,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:51,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:52,215 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 [2018-09-28 10:15:52,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:52,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:52,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:52,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:52,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:15:52,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:15:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:15:52,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:15:52,288 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:15:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,343 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:15:52,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:15:52,343 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:15:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,344 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:52,344 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:52,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:15:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:15:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:15:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:15:52,347 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:15:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,348 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:15:52,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:15:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:15:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:15:52,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,348 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:15:52,349 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-28 10:15:52,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:52,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:53,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:53,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:53,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:53,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:15:53,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:53,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:53,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:53,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:15:53,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:15:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:15:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:15:53,747 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:15:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:54,123 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:15:54,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:15:54,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:15:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:54,124 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:15:54,125 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:15:54,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:15:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:15:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:15:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:15:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:15:54,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:15:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:15:54,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:15:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:15:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:15:54,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:54,129 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:15:54,129 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:54,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-28 10:15:54,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:54,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:55,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:55,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:55,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:55,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:55,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:55,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:15:55,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:15:55,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:15:55,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:15:55,112 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:15:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:55,185 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:15:55,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:15:55,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:15:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:55,186 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:55,186 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:55,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:15:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:15:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:15:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:15:55,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:15:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:55,189 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:15:55,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:15:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:15:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:15:55,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:55,190 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:15:55,190 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:55,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-28 10:15:55,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:55,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:55,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:55,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:56,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:56,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:56,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:15:56,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:56,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:56,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:15:56,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:15:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:15:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:15:56,448 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:15:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:56,510 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:15:56,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:15:56,518 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:15:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:56,518 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:15:56,518 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:15:56,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:15:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:15:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:15:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:15:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:15:56,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:15:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:56,521 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:15:56,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:15:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:15:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:15:56,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:56,522 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:15:56,522 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:56,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-28 10:15:56,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:56,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:56,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:56,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:57,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:57,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:57,515 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:15:57,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:57,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:57,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:15:57,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:15:57,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:15:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:15:57,550 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:15:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:57,624 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:15:57,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:15:57,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:15:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:57,625 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:57,625 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:57,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:15:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:15:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:15:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:15:57,629 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:15:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:57,630 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:15:57,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:15:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:15:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:15:57,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:57,630 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:15:57,631 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:57,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-28 10:15:57,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:57,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:59,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:59,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:59,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:59,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:15:59,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:15:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:15:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:15:59,661 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:15:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:59,740 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:15:59,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:15:59,740 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:15:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:59,741 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:15:59,741 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:15:59,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:15:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:15:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:15:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:15:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:15:59,745 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:15:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:59,745 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:15:59,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:15:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:15:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:15:59,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:59,746 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:15:59,746 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:59,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-28 10:15:59,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:59,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:59,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:59,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:00,748 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 [2018-09-28 10:16:00,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:00,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:00,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:00,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:00,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:16:00,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:16:00,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:16:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:16:00,835 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:16:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:00,928 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:16:00,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:16:00,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:16:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:00,930 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:00,930 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:00,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:16:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:16:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:16:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:16:00,933 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:16:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:00,933 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:16:00,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:16:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:16:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:16:00,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:00,934 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:16:00,935 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:00,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-28 10:16:00,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:00,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:00,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:02,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:02,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:02,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:16:02,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:02,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:02,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:16:02,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:16:02,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:16:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:16:02,232 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:16:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:02,351 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:16:02,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:16:02,352 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:16:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:02,353 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:16:02,353 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:16:02,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:16:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:16:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:16:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:16:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:16:02,356 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:16:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:02,356 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:16:02,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:16:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:16:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:16:02,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:02,357 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:16:02,357 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:02,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-28 10:16:02,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:02,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:02,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:02,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:03,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:03,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:03,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:03,543 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:03,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:03,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:03,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:03,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:16:03,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:16:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:16:03,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:16:03,586 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:16:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:03,736 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:16:03,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:16:03,736 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:16:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:03,737 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:16:03,737 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:16:03,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:16:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:16:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:16:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:16:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:16:03,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:16:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:03,740 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:16:03,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:16:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:16:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:16:03,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:03,741 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:16:03,741 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:03,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-28 10:16:03,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:03,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:03,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:03,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:04,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:04,961 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 [2018-09-28 10:16:04,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:05,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:16:05,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:05,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:05,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:16:05,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:16:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:16:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:16:05,056 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:16:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:05,154 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:16:05,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:16:05,154 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:16:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:05,155 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:16:05,156 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:16:05,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:16:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:16:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:16:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:16:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:16:05,159 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:16:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:05,159 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:16:05,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:16:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:16:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:16:05,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:05,160 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:16:05,160 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:05,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-28 10:16:05,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:05,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:05,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:05,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:05,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:06,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:06,390 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 [2018-09-28 10:16:06,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:06,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:16:06,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:06,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:06,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:06,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:16:06,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:16:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:16:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:16:06,489 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:16:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:06,597 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:16:06,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:16:06,598 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:16:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:06,599 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:06,599 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:06,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:16:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:16:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:16:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:16:06,602 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:16:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:06,602 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:16:06,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:16:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:16:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:16:06,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:06,602 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:16:06,602 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:06,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-28 10:16:06,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:06,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:06,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:06,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:06,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:07,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:07,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:07,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:07,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:08,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:08,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:16:08,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:16:08,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:16:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:16:08,003 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:16:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:08,087 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:16:08,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:16:08,087 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:16:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:08,088 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:16:08,088 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:16:08,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:16:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:16:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:16:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:16:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:16:08,091 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:16:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:08,092 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:16:08,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:16:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:16:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:16:08,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:08,092 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:16:08,093 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:08,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-28 10:16:08,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:08,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:09,654 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 [2018-09-28 10:16:09,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:09,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:09,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:09,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:09,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:16:09,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:16:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:16:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:16:09,744 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:16:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:09,994 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:16:09,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:16:09,995 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:16:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:09,996 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:16:09,996 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:16:09,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:16:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:16:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:16:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:16:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:16:10,000 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:16:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:10,000 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:16:10,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:16:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:16:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:16:10,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:10,001 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:16:10,001 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:10,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-28 10:16:10,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:10,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:10,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:10,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:11,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:11,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:11,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:16:11,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:11,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:11,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:16:11,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:16:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:16:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:16:11,563 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:16:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:11,777 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:16:11,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:16:11,777 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:16:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:11,778 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:16:11,778 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:16:11,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:16:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:16:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:16:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:16:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:16:11,781 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:16:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:11,781 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:16:11,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:16:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:16:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:16:11,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:11,782 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:16:11,782 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:11,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:11,782 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-28 10:16:11,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:11,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:11,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:11,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:13,600 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 [2018-09-28 10:16:13,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:13,645 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:13,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:13,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:13,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:16:13,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:16:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:16:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:16:13,689 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:16:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:13,770 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:16:13,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:16:13,770 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:16:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:13,771 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:16:13,771 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:16:13,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:16:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:16:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:16:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:16:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:16:13,774 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:16:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:13,775 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:16:13,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:16:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:16:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:16:13,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:13,775 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:16:13,775 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:13,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-28 10:16:13,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:13,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:13,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:13,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:17,351 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 [2018-09-28 10:16:17,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:17,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:16:17,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:17,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:17,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:16:17,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:16:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:16:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:16:17,460 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:16:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:17,561 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:16:17,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:16:17,562 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:16:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:17,563 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:16:17,563 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:16:17,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:16:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:16:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:16:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:16:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:16:17,566 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:16:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:17,567 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:16:17,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:16:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:16:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:16:17,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:17,567 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:16:17,567 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:17,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-28 10:16:17,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:17,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:17,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:17,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:19,180 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 [2018-09-28 10:16:19,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:19,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:16:19,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:19,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:19,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:16:19,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:16:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:16:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:16:19,282 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:16:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:19,435 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:16:19,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:16:19,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:16:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:19,436 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:16:19,436 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:16:19,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:16:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:16:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:16:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:16:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:16:19,439 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:16:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:19,440 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:16:19,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:16:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:16:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:16:19,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:19,440 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:16:19,440 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:19,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-28 10:16:19,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:19,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:19,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:19,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:20,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:20,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:20,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:20,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:16:20,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:16:20,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:16:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:16:20,911 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:16:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:21,021 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:16:21,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:16:21,021 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:16:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:21,022 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:16:21,022 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:16:21,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:16:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:16:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:16:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:16:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:16:21,025 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:16:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:21,026 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:16:21,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:16:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:16:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:16:21,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:21,026 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:16:21,026 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:21,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:21,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-28 10:16:21,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:21,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:21,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:21,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:23,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:23,302 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 [2018-09-28 10:16:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:23,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:23,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:23,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:23,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:23,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:16:23,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:16:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:16:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:16:23,388 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:16:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:23,540 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:16:23,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:16:23,547 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:16:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:23,547 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:16:23,547 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:16:23,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:16:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:16:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:16:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:16:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:16:23,550 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:16:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:23,550 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:16:23,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:16:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:16:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:16:23,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:23,551 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:16:23,551 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:23,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-28 10:16:23,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:23,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:23,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:23,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:23,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:25,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:25,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:25,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:16:25,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:25,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:25,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:16:25,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:16:25,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:16:25,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:16:25,560 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:16:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:25,685 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:16:25,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:16:25,685 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:16:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:25,686 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:16:25,686 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:16:25,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:16:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:16:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:16:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:16:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:16:25,690 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:16:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:25,690 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:16:25,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:16:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:16:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:16:25,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:25,691 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:16:25,691 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:25,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-28 10:16:25,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:25,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:25,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:25,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:25,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:27,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:27,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:27,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:27,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:27,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:27,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:27,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:27,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:16:27,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:16:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:16:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:16:27,406 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:16:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:27,729 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:16:27,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:16:27,730 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:16:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:27,730 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:16:27,731 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:16:27,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:16:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:16:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:16:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:16:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:16:27,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:16:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:27,735 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:16:27,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:16:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:16:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:16:27,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:27,736 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:16:27,736 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:27,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-28 10:16:27,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:27,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:27,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:29,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:29,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:29,643 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:16:29,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:29,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:29,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:29,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:16:29,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:16:29,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:16:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:29,694 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:16:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:29,867 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:16:29,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:16:29,868 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:16:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:29,869 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:16:29,869 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:16:29,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:16:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:16:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:16:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:16:29,873 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:16:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:29,873 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:16:29,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:16:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:16:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:16:29,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:29,874 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:16:29,874 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:29,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-28 10:16:29,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:29,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:29,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:29,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:31,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:31,581 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:31,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:16:31,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:31,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:31,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:16:31,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:16:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:16:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:16:31,688 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:16:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:32,841 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:16:32,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:16:32,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:16:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:32,842 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:16:32,843 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:16:32,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:16:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:16:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:16:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:16:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:16:32,845 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:16:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:32,846 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:16:32,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:16:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:16:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:16:32,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:32,846 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:16:32,846 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:32,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-28 10:16:32,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:32,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:32,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:32,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:34,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:34,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:34,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:16:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:16:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:16:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:16:34,833 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:16:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:34,953 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:16:34,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:16:34,953 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:16:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:34,954 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:16:34,954 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:16:34,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:16:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:16:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:16:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:16:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:16:34,958 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:16:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:34,959 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:16:34,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:16:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:16:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:16:34,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:34,959 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:16:34,960 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:34,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-28 10:16:34,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:34,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:34,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:34,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:36,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:36,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:36,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:36,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:36,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:36,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:16:36,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:16:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:16:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:36,884 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:16:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:36,978 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:16:36,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:16:36,979 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:16:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:36,979 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:16:36,980 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:16:36,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:16:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:16:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:16:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:16:36,983 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:16:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:36,984 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:16:36,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:16:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:16:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:16:36,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:36,984 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:16:36,985 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:36,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-28 10:16:36,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:36,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:38,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:38,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:38,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:16:38,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:38,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:38,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:16:38,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:16:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:16:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:16:38,939 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:16:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:39,290 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:16:39,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:16:39,290 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:16:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:39,291 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:16:39,291 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:16:39,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:16:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:16:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:16:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:16:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:16:39,295 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:16:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:39,296 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:16:39,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:16:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:16:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:16:39,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:39,296 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:16:39,297 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:39,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-28 10:16:39,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:39,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:39,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:39,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:41,551 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 [2018-09-28 10:16:41,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:41,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:41,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:41,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:41,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:16:41,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:16:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:16:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:16:41,647 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:16:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:41,859 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:16:41,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:16:41,860 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:16:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:41,861 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:16:41,861 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:16:41,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:16:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:16:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:16:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:16:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:16:41,865 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:16:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:41,865 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:16:41,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:16:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:16:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:16:41,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:41,866 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:16:41,866 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:41,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-28 10:16:41,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:41,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:41,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:41,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:43,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:43,760 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 [2018-09-28 10:16:43,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:43,828 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:16:43,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:43,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:43,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:43,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:16:43,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:16:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:16:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:16:43,871 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:16:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:44,008 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:16:44,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:16:44,008 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:16:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:44,010 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:16:44,010 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:16:44,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:16:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:16:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:16:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:16:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:16:44,013 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:16:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:44,013 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:16:44,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:16:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:16:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:16:44,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:44,014 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:16:44,014 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:44,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-28 10:16:44,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:44,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:44,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:44,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:46,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:46,609 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 [2018-09-28 10:16:46,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:46,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:16:46,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:46,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:46,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:46,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:16:46,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:16:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:16:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:16:46,762 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-28 10:16:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:46,893 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:16:46,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:16:46,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-28 10:16:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:46,894 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:16:46,894 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:16:46,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:16:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:16:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:16:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:16:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:16:46,899 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:16:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:46,899 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:16:46,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:16:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:16:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:16:46,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:46,900 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:16:46,900 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:46,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-28 10:16:46,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:46,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:46,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:46,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:46,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:48,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:48,936 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 [2018-09-28 10:16:48,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:48,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:49,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:49,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:16:49,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:16:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:16:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:16:49,028 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-28 10:16:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:49,125 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:16:49,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:16:49,126 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-28 10:16:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:49,126 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:16:49,127 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:16:49,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:16:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:16:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:16:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:16:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:16:49,130 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:16:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:49,130 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:16:49,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:16:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:16:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:16:49,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:49,131 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-28 10:16:49,131 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:49,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-28 10:16:49,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:49,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:49,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:49,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:51,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:51,516 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 [2018-09-28 10:16:51,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:51,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:51,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:51,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:51,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:51,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:16:51,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:16:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:16:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:16:51,606 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-28 10:16:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:51,747 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:16:51,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:16:51,748 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-28 10:16:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:51,748 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:16:51,749 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:16:51,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:16:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:16:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:16:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:16:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:16:51,752 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:16:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:51,753 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:16:51,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:16:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:16:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:16:51,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:51,753 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:16:51,754 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:51,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-28 10:16:51,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:51,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:51,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:51,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:53,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:53,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:53,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:53,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:16:53,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:53,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:53,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:53,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:16:53,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:16:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:16:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:16:53,965 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-28 10:16:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:54,117 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:16:54,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:16:54,117 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-28 10:16:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:54,118 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:16:54,118 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:16:54,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:16:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:16:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:16:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:16:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:16:54,122 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:16:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:54,122 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:16:54,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:16:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:16:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:16:54,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:54,123 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-28 10:16:54,123 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:54,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-28 10:16:54,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:54,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:56,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:56,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:56,541 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:56,581 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:56,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:56,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:56,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:56,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:16:56,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:16:56,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:16:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:16:56,620 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-28 10:16:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:57,338 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:16:57,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:16:57,339 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-28 10:16:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:57,339 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:16:57,340 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:16:57,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:16:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:16:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:16:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:16:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:16:57,342 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:16:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:57,342 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:16:57,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:16:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:16:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:16:57,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:57,343 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-28 10:16:57,343 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:57,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:57,343 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-28 10:16:57,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:57,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:57,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:57,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:59,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:59,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:59,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:59,588 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:16:59,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:59,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:59,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:59,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:16:59,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:16:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:16:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:16:59,647 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-28 10:17:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:00,479 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:17:00,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:17:00,480 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-28 10:17:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:00,481 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:17:00,481 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:17:00,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:17:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:17:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:17:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:17:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:17:00,486 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:17:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:00,486 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:17:00,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:17:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:17:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:17:00,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:00,487 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-28 10:17:00,487 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:00,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:00,487 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-28 10:17:00,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:00,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:00,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:00,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:00,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:02,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:02,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:02,728 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:02,796 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:17:02,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:02,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:02,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:02,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:17:02,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:17:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:17:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:17:02,856 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-28 10:17:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:03,182 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:17:03,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:17:03,182 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-28 10:17:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:03,183 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:17:03,183 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:17:03,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:17:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:17:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:17:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:17:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:17:03,186 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:17:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:03,187 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:17:03,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:17:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:17:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:17:03,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:03,188 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-28 10:17:03,188 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:03,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-28 10:17:03,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:03,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:05,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:05,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:05,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:05,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:05,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:05,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:17:05,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:17:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:17:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:17:05,941 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-28 10:17:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:06,126 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:17:06,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:17:06,127 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-28 10:17:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:06,128 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:17:06,128 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:17:06,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:17:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:17:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:17:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:17:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:17:06,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:17:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:06,132 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:17:06,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:17:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:17:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:17:06,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:06,132 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-28 10:17:06,133 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:06,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-28 10:17:06,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:06,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:06,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:06,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:06,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:08,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:08,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:08,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:08,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:08,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:08,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:08,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:08,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:17:08,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:17:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:17:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:17:08,579 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-28 10:17:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:09,735 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:17:09,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:17:09,735 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-28 10:17:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:09,736 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:17:09,736 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:17:09,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:17:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:17:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:17:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:17:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:17:09,739 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:17:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:09,739 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:17:09,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:17:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:17:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:17:09,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:09,740 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-28 10:17:09,740 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:09,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-28 10:17:09,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:09,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:09,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:09,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:09,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:12,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:12,623 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 [2018-09-28 10:17:12,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:12,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:17:12,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:12,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:12,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:12,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:17:12,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:17:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:17:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:17:12,747 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-28 10:17:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:12,879 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:17:12,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:17:12,879 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-28 10:17:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:12,880 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:17:12,880 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:17:12,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:17:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:17:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:17:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:17:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:17:12,884 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:17:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:12,884 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:17:12,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:17:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:17:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:17:12,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:12,885 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-28 10:17:12,885 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:12,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-28 10:17:12,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:12,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:12,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:12,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:15,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:15,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:15,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:15,798 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:15,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:15,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:15,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:15,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:17:15,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:17:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:17:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:17:15,857 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-28 10:17:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:16,141 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:17:16,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:17:16,142 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-28 10:17:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:16,143 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:17:16,143 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:17:16,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:17:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:17:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:17:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:17:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:17:16,146 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:17:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:16,146 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:17:16,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:17:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:17:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:17:16,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:16,146 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-28 10:17:16,147 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:16,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-28 10:17:16,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:16,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:16,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:16,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:16,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:18,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:18,751 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 [2018-09-28 10:17:18,760 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:18,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:17:18,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:18,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:18,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:18,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:17:18,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:17:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:17:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:17:18,876 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-28 10:17:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:19,072 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:17:19,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:17:19,072 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-28 10:17:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:19,073 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:17:19,073 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:17:19,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:17:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:17:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:17:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:17:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:17:19,075 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:17:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:19,076 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:17:19,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:17:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:17:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:17:19,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:19,076 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-28 10:17:19,077 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:19,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-28 10:17:19,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:19,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:19,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:19,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:19,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:21,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:21,957 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 [2018-09-28 10:17:21,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:22,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:17:22,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:22,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:22,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:22,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:17:22,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:17:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:17:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:17:22,089 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-28 10:17:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:22,233 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:17:22,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:17:22,234 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-28 10:17:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:22,235 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:17:22,235 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:17:22,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:17:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:17:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:17:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:17:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:17:22,238 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:17:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:22,238 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:17:22,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:17:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:17:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:17:22,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:22,239 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-28 10:17:22,239 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:22,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-28 10:17:22,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:22,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:22,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:22,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:22,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:24,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:24,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:24,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:24,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:24,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:24,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:17:24,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:17:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:17:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:17:24,932 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-28 10:17:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:25,085 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:17:25,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:17:25,085 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-28 10:17:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:25,086 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:17:25,086 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:17:25,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:17:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:17:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:17:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:17:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:17:25,089 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:17:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:25,090 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:17:25,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:17:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:17:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:17:25,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:25,091 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-28 10:17:25,091 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:25,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-28 10:17:25,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:25,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:28,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:28,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:28,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:28,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:28,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:28,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:28,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:28,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:17:28,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:17:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:17:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:17:28,329 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-28 10:17:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:28,534 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:17:28,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:17:28,535 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-28 10:17:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:28,536 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:17:28,536 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:17:28,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:17:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:17:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:17:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:17:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:17:28,540 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:17:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:28,540 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:17:28,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:17:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:17:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:17:28,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:28,541 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-28 10:17:28,541 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:28,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-28 10:17:28,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:28,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:28,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:28,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:28,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:31,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:31,571 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 [2018-09-28 10:17:31,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:31,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:17:31,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:31,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:31,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:31,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:17:31,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:17:31,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:17:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:17:31,706 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-28 10:17:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:31,908 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:17:31,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:17:31,908 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-28 10:17:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:31,909 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:17:31,909 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:17:31,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:17:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:17:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:17:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:17:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:17:31,913 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:17:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:31,914 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:17:31,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:17:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:17:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:17:31,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:31,914 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-28 10:17:31,914 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:31,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-28 10:17:31,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:31,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:31,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:34,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:34,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:34,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:34,870 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:34,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:34,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:34,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:34,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:17:34,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:17:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:17:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:17:34,927 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-28 10:17:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:35,066 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:17:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:17:35,066 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-28 10:17:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:35,067 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:17:35,067 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:17:35,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:17:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:17:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:17:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:17:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:17:35,071 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:17:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:35,071 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:17:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:17:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:17:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:17:35,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:35,071 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-28 10:17:35,072 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:35,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-28 10:17:35,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:35,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:35,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:35,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:38,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:38,314 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 [2018-09-28 10:17:38,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:38,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:17:38,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:38,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:38,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:38,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:17:38,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:17:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:17:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:17:38,537 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-28 10:17:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:38,796 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:17:38,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:17:38,796 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-28 10:17:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:38,798 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:17:38,798 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:17:38,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:17:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:17:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:17:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:17:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:17:38,802 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:17:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:38,802 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:17:38,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:17:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:17:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:17:38,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:38,803 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-28 10:17:38,803 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:38,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-28 10:17:38,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:38,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:38,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:38,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:38,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:41,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:41,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:41,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:42,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:17:42,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:42,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:42,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:42,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:17:42,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:17:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:17:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:17:42,127 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-28 10:17:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:42,370 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:17:42,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:17:42,371 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-28 10:17:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:42,372 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:17:42,372 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:17:42,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:17:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:17:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:17:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:17:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:17:42,375 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:17:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:42,375 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:17:42,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:17:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:17:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:17:42,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:42,376 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-28 10:17:42,376 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:42,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-28 10:17:42,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:42,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:42,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:42,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:45,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:45,343 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 [2018-09-28 10:17:45,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:45,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:45,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:45,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:17:45,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:17:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:17:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:17:45,446 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-28 10:17:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:45,623 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:17:45,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:17:45,624 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-28 10:17:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:45,625 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:17:45,625 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:17:45,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:17:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:17:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:17:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:17:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:17:45,628 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:17:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:45,629 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:17:45,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:17:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:17:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:17:45,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:45,629 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-28 10:17:45,630 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:45,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-28 10:17:45,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:45,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:45,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:48,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:48,972 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 [2018-09-28 10:17:48,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:49,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:49,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:49,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:49,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:49,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:17:49,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:17:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:17:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:17:49,082 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-28 10:17:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:49,238 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:17:49,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:17:49,239 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-28 10:17:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:49,240 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:17:49,240 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:17:49,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:17:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:17:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:17:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:17:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:17:49,243 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:17:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:49,244 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:17:49,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:17:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:17:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:17:49,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:49,244 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-28 10:17:49,244 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:49,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-28 10:17:49,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:49,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:49,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:49,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:49,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:53,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:53,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:53,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:53,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:17:53,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:53,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:53,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:53,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:17:53,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:17:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:17:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:17:53,451 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-28 10:17:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:53,634 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:17:53,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:17:53,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-28 10:17:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:53,635 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:17:53,636 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:17:53,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:17:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:17:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:17:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:17:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:17:53,639 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:17:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:53,639 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:17:53,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:17:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:17:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:17:53,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:53,640 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-28 10:17:53,640 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:53,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-28 10:17:53,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:53,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:53,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:57,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:57,278 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 [2018-09-28 10:17:57,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:57,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:57,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:57,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:57,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:57,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:17:57,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:17:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:17:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:17:57,397 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-28 10:17:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:57,638 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:17:57,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:17:57,639 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-28 10:17:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:57,640 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:17:57,640 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:17:57,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:17:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:17:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:17:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:17:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:17:57,644 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:17:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:17:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:17:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:17:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:17:57,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:57,645 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-28 10:17:57,645 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:57,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-28 10:17:57,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:57,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:57,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:57,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:00,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:00,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:00,884 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:00,976 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:18:00,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:00,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:01,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:01,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:18:01,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:18:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:18:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:18:01,019 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-28 10:18:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:01,195 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:18:01,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:18:01,195 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-28 10:18:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:01,196 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:18:01,196 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:18:01,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:18:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:18:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:18:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:18:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:18:01,199 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:18:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:01,200 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:18:01,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:18:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:18:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:18:01,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:01,200 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-28 10:18:01,200 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:01,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:01,201 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-28 10:18:01,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:01,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:01,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:01,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:01,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:04,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:04,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:04,813 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:04,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:18:04,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:04,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:04,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:04,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:18:04,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:18:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:18:04,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:18:04,952 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-28 10:18:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:05,182 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:18:05,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:18:05,183 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-28 10:18:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:05,184 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:18:05,184 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:18:05,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:18:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:18:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:18:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:18:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:18:05,188 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:18:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:05,188 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:18:05,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:18:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:18:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:18:05,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:05,189 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-28 10:18:05,189 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:05,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-28 10:18:05,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:05,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:05,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:05,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:05,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:08,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:08,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:08,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:08,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:08,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:18:08,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:18:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:18:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:18:08,861 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-28 10:18:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:09,132 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:18:09,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:18:09,132 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-28 10:18:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:09,133 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:18:09,133 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:18:09,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:18:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:18:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:18:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:18:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:18:09,136 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:18:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:09,136 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:18:09,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:18:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:18:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:18:09,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:09,137 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-28 10:18:09,137 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:09,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-28 10:18:09,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:09,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:09,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:09,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:12,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:12,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:12,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:12,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:12,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:12,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:12,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:12,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:18:12,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:18:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:18:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:18:12,860 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-28 10:18:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:13,107 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:18:13,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:18:13,108 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-28 10:18:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:13,108 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:18:13,109 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:18:13,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:18:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:18:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:18:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:18:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:18:13,112 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:18:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:13,113 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:18:13,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:18:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:18:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:18:13,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:13,113 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-28 10:18:13,113 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:13,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-28 10:18:13,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:13,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:13,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:13,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:13,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:16,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:16,614 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 [2018-09-28 10:18:16,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:16,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:18:16,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:16,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:16,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:16,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:18:16,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:18:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:18:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:18:16,770 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-28 10:18:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:17,098 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-28 10:18:17,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:18:17,099 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-28 10:18:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:17,100 INFO L225 Difference]: With dead ends: 106 [2018-09-28 10:18:17,100 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:18:17,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:18:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:18:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:18:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:18:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:18:17,103 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:18:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:17,104 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:18:17,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:18:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:18:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:18:17,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:17,105 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-28 10:18:17,105 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:17,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-28 10:18:17,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:17,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:17,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:17,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:17,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:20,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:20,693 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 [2018-09-28 10:18:20,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:20,760 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:20,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:20,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:20,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:20,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:18:20,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:18:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:18:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:18:20,805 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-28 10:18:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:21,103 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:18:21,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:18:21,103 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-28 10:18:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:21,104 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:18:21,104 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:18:21,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:18:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:18:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:18:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:18:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:18:21,108 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-28 10:18:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:21,108 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:18:21,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:18:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:18:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:18:21,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:21,109 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-28 10:18:21,109 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:21,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-28 10:18:21,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:21,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:21,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:21,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:25,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:25,117 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 [2018-09-28 10:18:25,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:25,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-28 10:18:25,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:25,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:25,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:25,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:18:25,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:18:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:18:25,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:18:25,279 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-28 10:18:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:25,451 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-28 10:18:25,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:18:25,452 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-28 10:18:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:25,453 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:18:25,454 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:18:25,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:18:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:18:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:18:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:18:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:18:25,458 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-28 10:18:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:25,458 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:18:25,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:18:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:18:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:18:25,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:25,459 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-28 10:18:25,460 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:25,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-28 10:18:25,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:25,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:25,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:25,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:25,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:29,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:29,463 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 [2018-09-28 10:18:29,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:29,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-28 10:18:29,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:29,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:29,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:29,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:18:29,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:18:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:18:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:18:29,616 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-28 10:18:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:29,895 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:18:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:18:29,895 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-28 10:18:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:29,896 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:18:29,896 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:18:29,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:18:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:18:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:18:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:18:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:18:29,899 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-28 10:18:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:29,899 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:18:29,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:18:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:18:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:18:29,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:29,900 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-28 10:18:29,900 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:29,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-28 10:18:29,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:29,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:29,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:29,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:29,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:34,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:34,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:34,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:34,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:34,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:34,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:18:34,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:18:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:18:34,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:18:34,124 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-28 10:18:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:34,353 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-28 10:18:34,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:18:34,354 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-28 10:18:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:34,355 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:18:34,355 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:18:34,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:18:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:18:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:18:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:18:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:18:34,358 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-28 10:18:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:34,358 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:18:34,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:18:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:18:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:18:34,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:34,359 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-28 10:18:34,359 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:34,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-28 10:18:34,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:34,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:34,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:34,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:38,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:38,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:38,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:38,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:38,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:38,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:38,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:38,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:18:38,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:18:38,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:18:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:18:38,664 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-28 10:18:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:39,105 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:18:39,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:18:39,105 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-28 10:18:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:39,106 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:18:39,106 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:18:39,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:18:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:18:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:18:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:18:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:18:39,109 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-28 10:18:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:39,110 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:18:39,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:18:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:18:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:18:39,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:39,110 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-28 10:18:39,110 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:39,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-28 10:18:39,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:39,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:39,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:39,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:39,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:43,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:43,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:43,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:43,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-28 10:18:43,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:43,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:43,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:43,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:18:43,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:18:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:18:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:18:43,503 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-28 10:18:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:43,767 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-28 10:18:43,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:18:43,767 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-28 10:18:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:43,768 INFO L225 Difference]: With dead ends: 112 [2018-09-28 10:18:43,768 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:18:43,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:18:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:18:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:18:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:18:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:18:43,771 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-28 10:18:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:43,772 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:18:43,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:18:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:18:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:18:43,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:43,772 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-28 10:18:43,773 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:43,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-28 10:18:43,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:43,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:43,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:43,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:43,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:47,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:47,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:47,995 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:48,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:48,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:48,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:48,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:48,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:18:48,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:18:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:18:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:18:48,100 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-28 10:18:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:48,339 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:18:48,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:18:48,339 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-28 10:18:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:48,340 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:18:48,340 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:18:48,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:18:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:18:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:18:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:18:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:18:48,343 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-28 10:18:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:48,343 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:18:48,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:18:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:18:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:18:48,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:48,344 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-28 10:18:48,344 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:48,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-28 10:18:48,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:48,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:48,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:52,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:52,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:18:52,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:52,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:18:52,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:52,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:52,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:52,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:18:52,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:18:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:18:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:18:52,619 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-28 10:18:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:52,865 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-28 10:18:52,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:18:52,865 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-28 10:18:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:52,866 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:18:52,866 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:18:52,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:18:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:18:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:18:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:18:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:18:52,868 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-28 10:18:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:52,868 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:18:52,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:18:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:18:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:18:52,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:52,869 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-28 10:18:52,869 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:52,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-09-28 10:18:52,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:52,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:52,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:52,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:52,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:57,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:57,054 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 [2018-09-28 10:18:57,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:57,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:18:57,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:57,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:57,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:57,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:18:57,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:18:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:18:57,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-28 10:18:57,212 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-28 10:18:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:57,518 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:18:57,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:18:57,519 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-28 10:18:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:57,519 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:18:57,519 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:18:57,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-28 10:18:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:18:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:18:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:18:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:18:57,521 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-28 10:18:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:57,522 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:18:57,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:18:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:18:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:18:57,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:57,522 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-28 10:18:57,523 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:57,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-09-28 10:18:57,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:57,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:57,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:57,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:57,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:01,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:19:01,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:19:01,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:19:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:02,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:02,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:02,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:19:02,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:19:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:19:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:19:02,097 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-28 10:19:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:02,332 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-28 10:19:02,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:19:02,332 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-28 10:19:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:02,333 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:19:02,333 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:19:02,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:19:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:19:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:19:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:19:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:19:02,337 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-28 10:19:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:02,338 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:19:02,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:19:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:19:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:19:02,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:02,338 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-28 10:19:02,339 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:02,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-09-28 10:19:02,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:02,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:02,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:02,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:19:02,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:06,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:19:06,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:19:06,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:19:06,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:19:06,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:19:06,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:06,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:06,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-28 10:19:06,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:19:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:19:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-28 10:19:06,988 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-28 10:19:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:07,328 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:19:07,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:19:07,329 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-28 10:19:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:07,330 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:19:07,330 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:19:07,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-28 10:19:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:19:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:19:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:19:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:19:07,333 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-28 10:19:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:07,333 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:19:07,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:19:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:19:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:19:07,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:07,335 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-28 10:19:07,335 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:07,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:07,335 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-09-28 10:19:07,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:07,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:07,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:19:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:12,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:19:12,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:19:12,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:19:12,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-28 10:19:12,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:19:12,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:12,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:12,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-28 10:19:12,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:19:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:19:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:19:12,208 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-28 10:19:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:12,422 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-28 10:19:12,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-28 10:19:12,422 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-28 10:19:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:12,423 INFO L225 Difference]: With dead ends: 118 [2018-09-28 10:19:12,423 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:19:12,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:19:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:19:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:19:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:19:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:19:12,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-28 10:19:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:12,428 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:19:12,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:19:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:19:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:19:12,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:12,428 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-28 10:19:12,429 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:12,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-09-28 10:19:12,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:12,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:12,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:12,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:19:12,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:17,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:19:17,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:19:17,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:19:17,184 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:19:17,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:19:17,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:17,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:17,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-28 10:19:17,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-28 10:19:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-28 10:19:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-28 10:19:17,234 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-28 10:19:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:17,556 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:19:17,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-28 10:19:17,557 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-28 10:19:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:17,558 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:19:17,558 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:19:17,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-28 10:19:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:19:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:19:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:19:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:19:17,561 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-28 10:19:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:17,562 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:19:17,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-28 10:19:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:19:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:19:17,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:17,562 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-28 10:19:17,562 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:17,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-09-28 10:19:17,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:17,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:17,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:17,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:19:17,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:19:17,958 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:19:17,962 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:19:17,962 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:19:17 BoogieIcfgContainer [2018-09-28 10:19:17,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:19:17,963 INFO L168 Benchmark]: Toolchain (without parser) took 235910.14 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 211.6 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. [2018-09-28 10:19:17,964 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-09-28 10:19:17,964 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.11 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. [2018-09-28 10:19:17,964 INFO L168 Benchmark]: Boogie Preprocessor took 24.65 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. [2018-09-28 10:19:17,965 INFO L168 Benchmark]: RCFGBuilder took 266.82 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. [2018-09-28 10:19:17,965 INFO L168 Benchmark]: TraceAbstraction took 235569.48 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:19:17,967 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.11 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 24.65 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 266.82 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 235569.48 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 117 with TraceHistMax 113, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 115 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 114 OverallIterations, 113 TraceHistogramMax, 20.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 341 SDtfs, 2 SDslu, 4849 SDs, 0 SdLazy, 11403 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13106 GetRequests, 6665 SyntacticMatches, 0 SemanticMatches, 6441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 113 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 202.3s InterpolantComputationTime, 13331 NumberOfCodeBlocks, 13331 NumberOfCodeBlocksAsserted, 1840 NumberOfCheckSat, 13106 ConstructedInterpolants, 0 QuantifiedInterpolants, 2975960 SizeOfPredicates, 112 NumberOfNonLiveVariables, 26320 ConjunctsInSsa, 6552 ConjunctsInUnsatCore, 225 InterpolantComputations, 1 PerfectInterpolantSequences, 0/480928 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/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-19-17-975.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-19-17-975.csv Completed graceful shutdown