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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:34:44,776 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:34:44,782 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:34:44,800 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:34:44,800 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:34:44,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:34:44,804 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:34:44,806 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:34:44,808 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:34:44,809 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:34:44,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:34:44,816 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:34:44,818 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:34:44,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:34:44,823 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:34:44,824 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:34:44,828 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:34:44,830 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:34:44,835 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:34:44,840 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:34:44,843 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:34:44,845 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:34:44,849 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:34:44,862 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:34:44,886 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:34:44,886 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:34:44,887 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:34:44,891 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:34:44,892 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:34:44,892 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:34:44,893 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:34:44,894 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:34:44,894 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:34:44,894 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:34:44,894 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:34:44,894 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:34:44,895 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:34:44,895 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:34:44,895 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:34:44,895 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:34:44,896 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:34:44,897 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:34:44,897 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:34:44,897 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:34:44,897 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:34:44,898 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:34:44,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:34:44,898 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:34:44,898 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:34:44,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:34:44,899 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:34:44,899 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:34:44,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:34:44,900 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:34:44,953 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:34:44,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:34:44,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:34:44,971 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:34:44,972 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:34:44,973 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-23 21:34:44,973 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-23 21:34:45,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:34:45,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:34:45,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:34:45,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:34:45,032 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:34:45,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,073 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:34:45,073 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:34:45,074 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:34:45,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:34:45,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:34:45,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:34:45,077 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:34:45,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... [2018-09-23 21:34:45,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:34:45,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:34:45,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:34:45,101 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:34:45,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:34:45,177 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:34:45,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:34:45,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:34:45,379 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:34:45,380 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:34:45 BoogieIcfgContainer [2018-09-23 21:34:45,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:34:45,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:34:45,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:34:45,385 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:34:45,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:45" (1/2) ... [2018-09-23 21:34:45,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e33619 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:34:45, skipping insertion in model container [2018-09-23 21:34:45,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:34:45" (2/2) ... [2018-09-23 21:34:45,388 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-23 21:34:45,398 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:34:45,407 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:34:45,461 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:34:45,462 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:34:45,462 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:34:45,463 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:34:45,463 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:34:45,463 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:34:45,463 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:34:45,464 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:34:45,464 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:34:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 21:34:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 21:34:45,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:45,495 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 21:34:45,496 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:45,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-23 21:34:45,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:45,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:45,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:45,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:45,672 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:34:45,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:34:45,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:34:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:34:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:34:45,693 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 21:34:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:45,785 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-23 21:34:45,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:34:45,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 21:34:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:45,814 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:34:45,815 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:34:45,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:34:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:34:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:34:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:34:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-23 21:34:45,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-23 21:34:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:45,871 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-23 21:34:45,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:34:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-23 21:34:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:34:45,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:45,871 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 21:34:45,872 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:45,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-23 21:34:45,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:45,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:45,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:45,915 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:34:45,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:34:45,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:34:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:34:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:34:45,918 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-23 21:34:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:45,946 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-23 21:34:45,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:34:45,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 21:34:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:45,948 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:34:45,948 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:34:45,949 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 [2018-09-23 21:34:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:34:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:34:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:34:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 21:34:45,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-23 21:34:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:45,952 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 21:34:45,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:34:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 21:34:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:34:45,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:45,953 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 21:34:45,954 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:45,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-23 21:34:45,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:45,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:45,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:45,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:46,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:46,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 21:34:46,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:34:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:34:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:46,099 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-23 21:34:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,130 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-23 21:34:46,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:34:46,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-23 21:34:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,131 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:34:46,132 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:34:46,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:34:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:34:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:34:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 21:34:46,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-23 21:34:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,137 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 21:34:46,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:34:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 21:34:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:34:46,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,139 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-23 21:34:46,139 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-23 21:34:46,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:46,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:46,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:34:46,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:34:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:34:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:46,268 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-23 21:34:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,287 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-23 21:34:46,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:34:46,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 21:34:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,289 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:34:46,289 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:34:46,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:34:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:34:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:34:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-23 21:34:46,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-23 21:34:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,294 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-23 21:34:46,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:34:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-23 21:34:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:34:46,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,295 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-23 21:34:46,295 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-23 21:34:46,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:46,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:46,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:46,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:46,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:46,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:34:46,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:34:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:34:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:46,415 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-23 21:34:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,480 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-23 21:34:46,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:34:46,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:34:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,481 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:34:46,481 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:34:46,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:34:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:34:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:34:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-23 21:34:46,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-23 21:34:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,486 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-23 21:34:46,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:34:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-23 21:34:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:34:46,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,487 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-23 21:34:46,487 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-23 21:34:46,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:46,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:46,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:46,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:46,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:46,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:34:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:34:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:34:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:46,673 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-23 21:34:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,782 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-23 21:34:46,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:34:46,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-23 21:34:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,783 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:34:46,783 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:34:46,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:34:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:34:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:34:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 21:34:46,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-23 21:34:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,788 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 21:34:46,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:34:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 21:34:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:34:46,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,789 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-23 21:34:46,789 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-23 21:34:46,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:46,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:46,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:46,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:34:46,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:46,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:47,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:34:47,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:34:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:34:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:34:47,022 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-23 21:34:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:47,059 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-23 21:34:47,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:34:47,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-23 21:34:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:47,061 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:34:47,061 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:34:47,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:34:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:34:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:34:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:34:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 21:34:47,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-23 21:34:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:47,066 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 21:34:47,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:34:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 21:34:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:34:47,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:47,067 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-23 21:34:47,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:47,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:47,068 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-23 21:34:47,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:47,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:47,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:47,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:47,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:47,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:47,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 21:34:47,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:47,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:47,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 21:34:47,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:34:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:34:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:47,347 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-23 21:34:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:47,856 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-23 21:34:47,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:34:47,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-23 21:34:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:47,857 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:34:47,857 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:34:47,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:34:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:34:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:34:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:34:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-23 21:34:47,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-23 21:34:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:47,863 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-23 21:34:47,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:34:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-23 21:34:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:34:47,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:47,864 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-23 21:34:47,864 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:47,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-23 21:34:47,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:47,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:47,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:47,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:47,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:47,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:47,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:47,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:47,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:34:48,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:34:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:34:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:34:48,018 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-23 21:34:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:48,045 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-23 21:34:48,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:34:48,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-23 21:34:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:48,046 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:34:48,046 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:34:48,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:34:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:34:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:34:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:34:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-23 21:34:48,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-23 21:34:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:48,052 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-23 21:34:48,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:34:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-23 21:34:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:34:48,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:48,053 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-23 21:34:48,054 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:48,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-23 21:34:48,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:48,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:48,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:48,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:48,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:48,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:34:48,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:34:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:34:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:48,193 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-23 21:34:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:48,242 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-23 21:34:48,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:34:48,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-23 21:34:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:48,244 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:34:48,244 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:34:48,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:34:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:34:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:34:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-23 21:34:48,250 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-23 21:34:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:48,250 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-23 21:34:48,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:34:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-23 21:34:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:34:48,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:48,251 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-23 21:34:48,252 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:48,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-23 21:34:48,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:48,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:48,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:48,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:48,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:48,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:34:48,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:48,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:34:48,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:34:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:34:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:48,464 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-23 21:34:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:48,523 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-23 21:34:48,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:34:48,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-23 21:34:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:48,524 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:34:48,524 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:34:48,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:34:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:34:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:34:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-23 21:34:48,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-23 21:34:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:48,530 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-23 21:34:48,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:34:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-23 21:34:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:34:48,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:48,531 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-23 21:34:48,531 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:48,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-23 21:34:48,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:48,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:48,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:48,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:48,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:48,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:34:48,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:48,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:34:48,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:34:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:34:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:34:48,742 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-23 21:34:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:48,786 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-23 21:34:48,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:34:48,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-23 21:34:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:48,787 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:34:48,788 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:34:48,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:34:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:34:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:34:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:34:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 21:34:48,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-23 21:34:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:48,793 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 21:34:48,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:34:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 21:34:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:34:48,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:48,794 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-23 21:34:48,794 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:48,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-23 21:34:48,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:48,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:48,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:48,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:48,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:48,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 21:34:48,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:48,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:49,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 21:34:49,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:34:49,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:34:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:49,211 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-23 21:34:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:49,566 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-23 21:34:49,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:34:49,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-23 21:34:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:49,568 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:34:49,568 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:34:49,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:34:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:34:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:34:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:34:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-23 21:34:49,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-23 21:34:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:49,574 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-23 21:34:49,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:34:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-23 21:34:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:34:49,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:49,575 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-23 21:34:49,575 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:49,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-23 21:34:49,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:49,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:49,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:49,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:49,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:49,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:49,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:49,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:34:49,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:34:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:34:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:34:49,921 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-23 21:34:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:49,957 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-23 21:34:49,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:34:49,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-23 21:34:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:49,958 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:34:49,958 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:34:49,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:34:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:34:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:34:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:34:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-23 21:34:49,965 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-23 21:34:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:49,966 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-23 21:34:49,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:34:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-23 21:34:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:34:49,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:49,967 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-23 21:34:49,967 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:49,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-23 21:34:49,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:49,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:49,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:49,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:50,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:50,139 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:50,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 21:34:50,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:50,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:50,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:34:50,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:34:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:34:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:50,191 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-23 21:34:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:50,243 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-23 21:34:50,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:34:50,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-23 21:34:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:50,244 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:34:50,244 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:34:50,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:34:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:34:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:34:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-23 21:34:50,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-23 21:34:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:50,250 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-23 21:34:50,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:34:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-23 21:34:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:34:50,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:50,251 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-23 21:34:50,251 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:50,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-23 21:34:50,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:50,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:50,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:50,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:50,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:50,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:50,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:50,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:50,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:34:50,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:34:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:34:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:50,442 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-23 21:34:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:50,475 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-23 21:34:50,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:34:50,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-23 21:34:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:50,476 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:34:50,477 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:34:50,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:34:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:34:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:34:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-23 21:34:50,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-23 21:34:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:50,482 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-23 21:34:50,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:34:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-23 21:34:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:34:50,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:50,484 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-23 21:34:50,484 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:50,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-23 21:34:50,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:50,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:50,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:50,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:50,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:50,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:50,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:34:50,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:34:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:34:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:34:50,691 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-23 21:34:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:50,732 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-23 21:34:50,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:34:50,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-23 21:34:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:50,733 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:34:50,734 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:34:50,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:34:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:34:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:34:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:34:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-23 21:34:50,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-23 21:34:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:50,740 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-23 21:34:50,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:34:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-23 21:34:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:34:50,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:50,741 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-23 21:34:50,741 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:50,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-23 21:34:50,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:50,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:50,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:50,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:50,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:50,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:51,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 21:34:51,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:51,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:51,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:51,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 21:34:51,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:34:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:34:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:34:51,455 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-23 21:34:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:52,227 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-23 21:34:52,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:34:52,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-23 21:34:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:52,228 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:34:52,229 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:34:52,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:34:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:34:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:34:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:34:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-23 21:34:52,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-23 21:34:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:52,235 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-23 21:34:52,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:34:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-23 21:34:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:34:52,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:52,237 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-23 21:34:52,237 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:52,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-23 21:34:52,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:52,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:52,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:52,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:52,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:52,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:52,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:52,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:52,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:52,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:52,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 21:34:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:34:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:34:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:34:52,620 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-23 21:34:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:53,069 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-23 21:34:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:34:53,069 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-23 21:34:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:53,069 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:34:53,069 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:34:53,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:34:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:34:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:34:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:34:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-23 21:34:53,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-23 21:34:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:53,075 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-23 21:34:53,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:34:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-23 21:34:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:34:53,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:53,076 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-23 21:34:53,077 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:53,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-23 21:34:53,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:53,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:53,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:53,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:53,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:53,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:53,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:53,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:34:53,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:53,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:53,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:53,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:34:53,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:34:53,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:34:53,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:34:53,733 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-23 21:34:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:53,812 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-23 21:34:53,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:34:53,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-23 21:34:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:53,814 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:34:53,814 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:34:53,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:34:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:34:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:34:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:34:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-23 21:34:53,819 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-23 21:34:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:53,819 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-23 21:34:53,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:34:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-23 21:34:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:34:53,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:53,821 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-23 21:34:53,821 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:53,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-23 21:34:53,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:53,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:53,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:54,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:54,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:54,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:54,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:54,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:54,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:34:54,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:34:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:34:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:34:54,143 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-23 21:34:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:54,201 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-23 21:34:54,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:34:54,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-23 21:34:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:54,202 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:34:54,202 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:34:54,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:34:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:34:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:34:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:34:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-23 21:34:54,208 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-23 21:34:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:54,208 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-23 21:34:54,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:34:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-23 21:34:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:34:54,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:54,209 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-23 21:34:54,209 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:54,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-23 21:34:54,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:54,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:54,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:54,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:54,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:54,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:54,386 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:54,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 21:34:54,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:54,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:54,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 21:34:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:34:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:34:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:34:54,955 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-23 21:34:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:55,531 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-23 21:34:55,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:34:55,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-23 21:34:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:55,535 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:34:55,535 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:34:55,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:34:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:34:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:34:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:34:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-23 21:34:55,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-23 21:34:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:55,542 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-23 21:34:55,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:34:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-23 21:34:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:34:55,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:55,543 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-23 21:34:55,544 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:55,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-23 21:34:55,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:55,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:55,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:55,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:55,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:55,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:55,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:55,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:55,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:55,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:34:55,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:34:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:34:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:34:55,909 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-23 21:34:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:55,945 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-23 21:34:55,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:34:55,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 21:34:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:55,947 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:34:55,947 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:34:55,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:34:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:34:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:34:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:34:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-23 21:34:55,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-23 21:34:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:55,953 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-23 21:34:55,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:34:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-23 21:34:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:34:55,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:55,954 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-23 21:34:55,954 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:55,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-23 21:34:55,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:55,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:55,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:55,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:56,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:56,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:56,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:34:56,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:56,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:56,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:34:56,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:34:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:34:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:56,284 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-23 21:34:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:56,563 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-23 21:34:56,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:34:56,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-23 21:34:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:56,564 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:34:56,565 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:34:56,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:34:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:34:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:34:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-23 21:34:56,569 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-23 21:34:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:56,570 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-23 21:34:56,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:34:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-23 21:34:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:34:56,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:56,571 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-23 21:34:56,571 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:56,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-23 21:34:56,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:56,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:56,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:56,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:56,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:56,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:56,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:56,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:56,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:56,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:34:56,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:34:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:34:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:56,807 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-23 21:34:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:56,845 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-23 21:34:56,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:34:56,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-23 21:34:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:56,852 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:34:56,852 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:34:56,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:34:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:34:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:34:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-23 21:34:56,856 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-23 21:34:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:56,856 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-23 21:34:56,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:34:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-23 21:34:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:34:56,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:56,857 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-23 21:34:56,857 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:56,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-23 21:34:56,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:56,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:56,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:56,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:57,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:57,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:57,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:57,093 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:57,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:57,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:57,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:57,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:34:57,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:34:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:34:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:34:57,125 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-23 21:34:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:57,226 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-23 21:34:57,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:34:57,227 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-23 21:34:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:57,227 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:34:57,227 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:34:57,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:34:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:34:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:34:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:34:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-23 21:34:57,233 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-23 21:34:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:57,233 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-23 21:34:57,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:34:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-23 21:34:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:34:57,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:57,235 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-23 21:34:57,236 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:57,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-23 21:34:57,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:57,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:57,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:57,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:57,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:57,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:57,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:57,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:57,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 21:34:57,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:57,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:57,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:57,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 21:34:57,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:34:57,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:34:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:34:57,961 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-23 21:34:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:58,816 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-23 21:34:58,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:34:58,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-23 21:34:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:58,817 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:34:58,817 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:34:58,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:34:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:34:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:34:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:34:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-23 21:34:58,822 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-23 21:34:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:58,822 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-23 21:34:58,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:34:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-23 21:34:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:34:58,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:58,823 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-23 21:34:58,823 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:58,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-23 21:34:58,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:58,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:58,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:58,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:58,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:59,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:59,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:59,243 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:59,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:59,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:59,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:34:59,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:34:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:34:59,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:34:59,273 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-23 21:34:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:59,334 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-23 21:34:59,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:34:59,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-23 21:34:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:59,335 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:34:59,335 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:34:59,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:34:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:34:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:34:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:34:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-23 21:34:59,338 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-23 21:34:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:59,339 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-23 21:34:59,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:34:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-23 21:34:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:34:59,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:59,339 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-23 21:34:59,340 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:59,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-23 21:34:59,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:59,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:59,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:59,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:59,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:59,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:59,639 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:34:59,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:59,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:59,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:34:59,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:34:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:34:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:34:59,683 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-23 21:34:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:59,727 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-23 21:34:59,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:34:59,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-23 21:34:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:59,729 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:34:59,729 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:34:59,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:34:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:34:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:34:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:34:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-23 21:34:59,733 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-23 21:34:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:59,733 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-23 21:34:59,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:34:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-23 21:34:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:34:59,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:59,734 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-23 21:34:59,734 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:59,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-23 21:34:59,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:59,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:59,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:59,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:59,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:59,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:00,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:35:00,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:00,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:00,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:00,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:35:00,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:35:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:35:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:35:00,067 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-23 21:35:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:00,126 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-23 21:35:00,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:35:00,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-23 21:35:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:00,128 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:35:00,128 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:35:00,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:35:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:35:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:35:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:35:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-23 21:35:00,132 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-23 21:35:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:00,132 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-23 21:35:00,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:35:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-23 21:35:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:35:00,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:00,132 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-23 21:35:00,133 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:00,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-23 21:35:00,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:00,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:00,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:00,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:00,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:01,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:01,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:01,139 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:35:01,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:01,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:01,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:35:01,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:35:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:35:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:35:01,185 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-23 21:35:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:01,296 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-23 21:35:01,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:35:01,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-23 21:35:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:01,298 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:35:01,298 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:35:01,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:35:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:35:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:35:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:35:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-23 21:35:01,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-23 21:35:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:01,303 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-23 21:35:01,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:35:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-23 21:35:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:35:01,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:01,304 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-23 21:35:01,305 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:01,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-23 21:35:01,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:01,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:01,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:01,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:01,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:01,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 21:35:01,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:01,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:02,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:02,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 21:35:02,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:35:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:35:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:35:02,194 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-23 21:35:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:03,178 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-23 21:35:03,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:35:03,179 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-23 21:35:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:03,180 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:35:03,180 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:35:03,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:35:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:35:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:35:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:35:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-23 21:35:03,186 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-23 21:35:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:03,186 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-23 21:35:03,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:35:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-23 21:35:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:35:03,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:03,187 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-23 21:35:03,188 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:03,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-23 21:35:03,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:03,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:03,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:03,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:03,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:03,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:35:03,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:35:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:35:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:35:03,516 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-23 21:35:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:03,557 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-23 21:35:03,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:35:03,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-23 21:35:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:03,558 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:35:03,558 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:35:03,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:35:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:35:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:35:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:35:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-23 21:35:03,563 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-23 21:35:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:03,563 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-23 21:35:03,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:35:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-23 21:35:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:35:03,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:03,564 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-23 21:35:03,564 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:03,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-23 21:35:03,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:03,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:03,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:03,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:03,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:03,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:03,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:03,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:35:03,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:35:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:35:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:35:03,891 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-23 21:35:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:03,972 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-23 21:35:03,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:35:03,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-23 21:35:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:03,973 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:35:03,973 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:35:03,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:35:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:35:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:35:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:35:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-23 21:35:03,975 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-23 21:35:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:03,976 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-23 21:35:03,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:35:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-23 21:35:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:35:03,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:03,976 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-23 21:35:03,976 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:03,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-23 21:35:03,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:03,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:03,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:04,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:04,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:04,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:04,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:04,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:04,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:04,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:04,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:35:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:35:04,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:35:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:35:04,587 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-23 21:35:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:04,628 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-23 21:35:04,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:35:04,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-23 21:35:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:04,630 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:35:04,630 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:35:04,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:35:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:35:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:35:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:35:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-23 21:35:04,633 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-23 21:35:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:04,634 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-23 21:35:04,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:35:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-23 21:35:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:35:04,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:04,634 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-23 21:35:04,635 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:04,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-23 21:35:04,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:04,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:04,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:04,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:04,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:04,874 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 [2018-09-23 21:35:04,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:04,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:04,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:04,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:04,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:04,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:35:04,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:35:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:35:04,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:35:04,949 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-23 21:35:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:05,032 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-23 21:35:05,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:35:05,033 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-23 21:35:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:05,034 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:35:05,034 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:35:05,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:35:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:35:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:35:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:35:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-23 21:35:05,038 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-23 21:35:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:05,039 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-23 21:35:05,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:35:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-23 21:35:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:35:05,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:05,039 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-23 21:35:05,040 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:05,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-23 21:35:05,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:05,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:05,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:05,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:05,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:05,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:05,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:05,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 21:35:05,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:05,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:05,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 21:35:05,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:35:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:35:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:35:05,921 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-23 21:35:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:06,968 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-23 21:35:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:35:06,969 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-23 21:35:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:06,969 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:35:06,970 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:35:06,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:35:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:35:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:35:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:35:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-23 21:35:06,976 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-23 21:35:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:06,977 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-23 21:35:06,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:35:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-23 21:35:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:35:06,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:06,977 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-23 21:35:06,978 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:06,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-23 21:35:06,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:06,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:06,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:06,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:06,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:08,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:08,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:08,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:08,293 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:08,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:08,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:08,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:08,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 21:35:08,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:35:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:35:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:35:08,795 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-23 21:35:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:10,439 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-23 21:35:10,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:35:10,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-23 21:35:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:10,441 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:35:10,441 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:35:10,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:35:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:35:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:35:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:35:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-23 21:35:10,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-23 21:35:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:10,448 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-23 21:35:10,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:35:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-23 21:35:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:35:10,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:10,448 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-23 21:35:10,449 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:10,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-23 21:35:10,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:10,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:10,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:10,756 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:10,794 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:35:10,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:10,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:10,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:35:10,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:35:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:35:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:35:10,832 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-23 21:35:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:11,001 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-23 21:35:11,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:35:11,001 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-23 21:35:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:11,002 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:35:11,002 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:35:11,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:35:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:35:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:35:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:35:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-23 21:35:11,007 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-23 21:35:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:11,007 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-23 21:35:11,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:35:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-23 21:35:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:35:11,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:11,008 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-23 21:35:11,009 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:11,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-23 21:35:11,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:11,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:11,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:11,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:11,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:11,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:11,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-23 21:35:11,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:11,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:11,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:11,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:35:11,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:35:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:35:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:35:11,599 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-23 21:35:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:11,708 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-23 21:35:11,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:35:11,708 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-23 21:35:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:11,709 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:35:11,709 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:35:11,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:35:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:35:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:35:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:35:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-23 21:35:11,714 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-23 21:35:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:11,714 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-23 21:35:11,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:35:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-23 21:35:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:35:11,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:11,715 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-23 21:35:11,715 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:11,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:11,715 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-23 21:35:11,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:11,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:11,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:11,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:11,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:12,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:12,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:12,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:12,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 21:35:12,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:12,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:12,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:12,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 21:35:12,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:35:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:35:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:35:12,673 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-23 21:35:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:13,998 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-23 21:35:13,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:35:13,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-23 21:35:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:14,000 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:35:14,000 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:35:14,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:35:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:35:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:35:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:35:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-23 21:35:14,005 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-23 21:35:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:14,005 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-23 21:35:14,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:35:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-23 21:35:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:35:14,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:14,006 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-23 21:35:14,006 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:14,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-23 21:35:14,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:14,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:14,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:14,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:14,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:14,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:14,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:14,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:14,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:14,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:14,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:35:14,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:35:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:35:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:35:14,773 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-23 21:35:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:14,847 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-23 21:35:14,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:35:14,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-23 21:35:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:14,849 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:35:14,849 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:35:14,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:35:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:35:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:35:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:35:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-23 21:35:14,854 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-23 21:35:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:14,854 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-23 21:35:14,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:35:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-23 21:35:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:35:14,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:14,855 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-23 21:35:14,856 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:14,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-23 21:35:14,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:14,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:14,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:15,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:15,218 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:15,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:15,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:15,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:15,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:35:15,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:35:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:35:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:35:15,276 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-23 21:35:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:15,338 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-23 21:35:15,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:35:15,339 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-23 21:35:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:15,340 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:35:15,340 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:35:15,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:35:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:35:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:35:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:35:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-23 21:35:15,344 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-23 21:35:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:15,345 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-23 21:35:15,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:35:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-23 21:35:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:35:15,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:15,345 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-23 21:35:15,346 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:15,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-23 21:35:15,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:15,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:15,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:15,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:15,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:15,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:15,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:15,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:35:15,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:35:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:35:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:35:15,817 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-23 21:35:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:15,862 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-23 21:35:15,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:35:15,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-23 21:35:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:15,864 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:35:15,864 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:35:15,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:35:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:35:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:35:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:35:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-23 21:35:15,869 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-23 21:35:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:15,869 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-23 21:35:15,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:35:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-23 21:35:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:35:15,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:15,870 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-23 21:35:15,870 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:15,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-23 21:35:15,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:15,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:15,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:15,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:16,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:16,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:16,581 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:16,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:35:16,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:16,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:16,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:16,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:35:16,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:35:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:35:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:35:16,667 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-23 21:35:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:16,720 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-23 21:35:16,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:35:16,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-23 21:35:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:16,721 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:35:16,722 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:35:16,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:35:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:35:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:35:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:35:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-23 21:35:16,725 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-23 21:35:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:16,725 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-23 21:35:16,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:35:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-23 21:35:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:35:16,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:16,726 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-23 21:35:16,726 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:16,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-23 21:35:16,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:16,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:16,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:16,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:16,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:17,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:17,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:17,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:17,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 21:35:17,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:17,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:17,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:17,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 21:35:17,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:35:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:35:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:35:17,819 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-23 21:35:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:19,811 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-23 21:35:19,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:35:19,811 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-23 21:35:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:19,813 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:35:19,813 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:35:19,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-23 21:35:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:35:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:35:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:35:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-23 21:35:19,819 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-23 21:35:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:19,819 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-23 21:35:19,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:35:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-23 21:35:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:35:19,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:19,820 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-23 21:35:19,820 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:19,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-23 21:35:19,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:19,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:19,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:20,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:20,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:20,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:20,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:20,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:20,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:35:20,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:35:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:35:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:35:20,300 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-23 21:35:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:20,401 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-23 21:35:20,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:35:20,401 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-23 21:35:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:20,402 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:35:20,402 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:35:20,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:35:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:35:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:35:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:35:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-23 21:35:20,406 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-23 21:35:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-23 21:35:20,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:35:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-23 21:35:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:35:20,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:20,407 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-23 21:35:20,407 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:20,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-23 21:35:20,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:20,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:20,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:20,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:21,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:21,052 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-23 21:35:21,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:21,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:21,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:21,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:35:21,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:35:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:35:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:35:21,089 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-23 21:35:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:21,141 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-23 21:35:21,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:35:21,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-23 21:35:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:21,143 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:35:21,143 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:35:21,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:35:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:35:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:35:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:35:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-23 21:35:21,147 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-23 21:35:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:21,148 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-23 21:35:21,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:35:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-23 21:35:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:35:21,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:21,149 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-23 21:35:21,149 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:21,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-23 21:35:21,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:21,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:21,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:21,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:21,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:21,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:21,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:21,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:35:21,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:21,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:21,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:21,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:35:21,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:35:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:35:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:35:21,709 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-23 21:35:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:21,805 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-23 21:35:21,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:35:21,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-23 21:35:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:21,807 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:35:21,807 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:35:21,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:35:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:35:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:35:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:35:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-23 21:35:21,811 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-23 21:35:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:21,811 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-23 21:35:21,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:35:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-23 21:35:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:35:21,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:21,812 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-23 21:35:21,812 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:21,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-23 21:35:21,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:21,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:21,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:21,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:23,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:23,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:23,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:23,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:23,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:23,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:35:23,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:35:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:35:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:35:23,267 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-23 21:35:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:23,342 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-23 21:35:23,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:35:23,342 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-23 21:35:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:23,343 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:35:23,344 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:35:23,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:35:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:35:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:35:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:35:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-23 21:35:23,348 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-23 21:35:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:23,349 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-23 21:35:23,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:35:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-23 21:35:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:35:23,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:23,350 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-23 21:35:23,350 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:23,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-23 21:35:23,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:23,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:24,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:24,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:24,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:24,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 21:35:24,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:24,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:25,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:25,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 21:35:25,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:35:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:35:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:35:25,301 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-23 21:35:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:27,280 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-23 21:35:27,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:35:27,281 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-23 21:35:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:27,282 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:35:27,282 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:35:27,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-23 21:35:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:35:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:35:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:35:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-23 21:35:27,287 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-23 21:35:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:27,288 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-23 21:35:27,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:35:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-23 21:35:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:35:27,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:27,289 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-23 21:35:27,289 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:27,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-23 21:35:27,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:27,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:27,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:27,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:27,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:27,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:27,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:27,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:27,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:28,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:28,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:35:28,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:35:28,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:35:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:35:28,016 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-23 21:35:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:28,636 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-23 21:35:28,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:35:28,636 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-23 21:35:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:28,637 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:35:28,637 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:35:28,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:35:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:35:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:35:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:35:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-23 21:35:28,642 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-23 21:35:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:28,642 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-23 21:35:28,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:35:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-23 21:35:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:35:28,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:28,643 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-23 21:35:28,643 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:28,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-23 21:35:28,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:28,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:28,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:28,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:28,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:29,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:29,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:29,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:29,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:29,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:29,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:29,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:29,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:35:29,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:35:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:35:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:35:29,271 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-23 21:35:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:29,348 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-23 21:35:29,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:35:29,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-23 21:35:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:29,349 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:35:29,349 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:35:29,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:35:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:35:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:35:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:35:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-23 21:35:29,353 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-23 21:35:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:29,353 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-23 21:35:29,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:35:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-23 21:35:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:35:29,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:29,354 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-23 21:35:29,354 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:29,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-23 21:35:29,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:29,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:29,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:29,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:29,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:30,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:30,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:30,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:30,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:30,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:30,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:30,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:30,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:35:30,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:35:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:35:30,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:35:30,429 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-23 21:35:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:30,590 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-23 21:35:30,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:35:30,590 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-23 21:35:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:30,591 INFO L225 Difference]: With dead ends: 108 [2018-09-23 21:35:30,592 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:35:30,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:35:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:35:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:35:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:35:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-23 21:35:30,597 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-23 21:35:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:30,597 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-23 21:35:30,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:35:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-23 21:35:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:35:30,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:30,598 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-23 21:35:30,598 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:30,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-23 21:35:30,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:30,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:30,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:30,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:30,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:31,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:31,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:31,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:31,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 21:35:31,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:31,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:31,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:31,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:35:31,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:35:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:35:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:35:31,287 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-23 21:35:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:31,378 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-23 21:35:31,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:35:31,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-23 21:35:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:31,380 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:35:31,381 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:35:31,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:35:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:35:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:35:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:35:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-23 21:35:31,385 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-23 21:35:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:31,385 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-23 21:35:31,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:35:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-23 21:35:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:35:31,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:31,386 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-23 21:35:31,386 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:31,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-23 21:35:31,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:31,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:31,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:31,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:31,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:32,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:32,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:32,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:32,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-23 21:35:32,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:32,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:33,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:33,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 21:35:33,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:35:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:35:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:35:33,214 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-23 21:35:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:35,815 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-23 21:35:35,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:35:35,816 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-23 21:35:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:35,817 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:35:35,817 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:35:35,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-23 21:35:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:35:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:35:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:35:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-23 21:35:35,823 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-23 21:35:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:35,823 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-23 21:35:35,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:35:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-23 21:35:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:35:35,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:35,824 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-23 21:35:35,824 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:35,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:35,824 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-23 21:35:35,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:35,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:35,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:35,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:35,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:36,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:36,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:36,715 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:36,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:36,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:36,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:36,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:36,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:35:36,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:35:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:35:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:35:36,796 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-23 21:35:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:37,222 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-23 21:35:37,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:35:37,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-23 21:35:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:37,223 INFO L225 Difference]: With dead ends: 114 [2018-09-23 21:35:37,223 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:35:37,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:35:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:35:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:35:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:35:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-23 21:35:37,228 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-23 21:35:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:37,229 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-23 21:35:37,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:35:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-23 21:35:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:35:37,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:37,230 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-23 21:35:37,230 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:37,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-23 21:35:37,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:37,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:37,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:37,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:37,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:40,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:40,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:40,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:40,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:40,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:40,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:40,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:35:40,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:35:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:35:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:35:40,612 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-23 21:35:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:40,681 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-23 21:35:40,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:35:40,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-23 21:35:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:40,683 INFO L225 Difference]: With dead ends: 116 [2018-09-23 21:35:40,683 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 21:35:40,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:35:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 21:35:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 21:35:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:35:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-23 21:35:40,699 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-23 21:35:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:40,700 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-23 21:35:40,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:35:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-23 21:35:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:35:40,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:40,700 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-23 21:35:40,701 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:40,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-23 21:35:40,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:40,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:40,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:40,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:40,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:41,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:41,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:41,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:41,605 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:35:41,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:41,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:41,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:41,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:35:41,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:35:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:35:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:35:41,653 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-23 21:35:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:41,742 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-23 21:35:41,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:35:41,743 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-23 21:35:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:41,744 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:35:41,744 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:35:41,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:35:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:35:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:35:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:35:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-23 21:35:41,748 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-23 21:35:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:41,748 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-23 21:35:41,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:35:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-23 21:35:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:35:41,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:41,749 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-23 21:35:41,750 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:41,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-23 21:35:41,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:41,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:41,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:41,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:41,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:43,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:43,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:43,953 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:44,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:35:44,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:44,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:44,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:44,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:35:44,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:35:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:35:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:35:44,052 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-23 21:35:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:44,133 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-23 21:35:44,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:35:44,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-23 21:35:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:44,134 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:35:44,135 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:35:44,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:35:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:35:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:35:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:35:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-23 21:35:44,138 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-23 21:35:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:44,139 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-23 21:35:44,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:35:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-23 21:35:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:35:44,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:44,139 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-23 21:35:44,139 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:44,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-23 21:35:44,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:44,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:44,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:44,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:44,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:44,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:44,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:44,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:44,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 21:35:44,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:44,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:46,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:46,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 21:35:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:35:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:35:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:35:46,248 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-23 21:35:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:48,958 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-23 21:35:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:35:48,958 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-23 21:35:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:48,959 INFO L225 Difference]: With dead ends: 122 [2018-09-23 21:35:48,959 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 21:35:48,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-23 21:35:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 21:35:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 21:35:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 21:35:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-23 21:35:48,965 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-23 21:35:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:48,965 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-23 21:35:48,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:35:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-23 21:35:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:35:48,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:48,966 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-23 21:35:48,966 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:48,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-23 21:35:48,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:48,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:48,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:50,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:50,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:50,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:50,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:50,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:50,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:35:50,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:35:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:35:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:35:50,551 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-23 21:35:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:51,556 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-23 21:35:51,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:35:51,557 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-23 21:35:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:51,558 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:35:51,558 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:35:51,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:35:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:35:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 21:35:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:35:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-23 21:35:51,562 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-23 21:35:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:51,562 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-23 21:35:51,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:35:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-23 21:35:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:35:51,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:51,563 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-23 21:35:51,563 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:51,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-23 21:35:51,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:51,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:51,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:51,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:51,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:52,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:52,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:52,572 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:52,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-23 21:35:52,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:52,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:52,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:52,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:35:52,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:35:52,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:35:52,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:35:52,689 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-23 21:35:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:52,762 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-23 21:35:52,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:35:52,763 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-23 21:35:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:52,764 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:35:52,764 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:35:52,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:35:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:35:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 21:35:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 21:35:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-23 21:35:52,769 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-23 21:35:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:52,769 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-23 21:35:52,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:35:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-23 21:35:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 21:35:52,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:52,771 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-23 21:35:52,771 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:52,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-23 21:35:52,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:52,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:52,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:53,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:53,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:53,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:53,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:53,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:53,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:53,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:53,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:35:53,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:35:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:35:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:35:53,566 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-23 21:35:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:53,720 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-23 21:35:53,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:35:53,721 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-23 21:35:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:53,722 INFO L225 Difference]: With dead ends: 126 [2018-09-23 21:35:53,722 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 21:35:53,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:35:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 21:35:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-23 21:35:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 21:35:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-23 21:35:53,726 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-23 21:35:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:53,727 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-23 21:35:53,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:35:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-23 21:35:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 21:35:53,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:53,728 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-23 21:35:53,728 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:53,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-23 21:35:53,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:53,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:53,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:53,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:53,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:54,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:54,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:54,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:54,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:54,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:54,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:35:54,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:35:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:35:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:35:54,701 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-23 21:35:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:54,842 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-23 21:35:54,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:35:54,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-23 21:35:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:54,843 INFO L225 Difference]: With dead ends: 128 [2018-09-23 21:35:54,843 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 21:35:54,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:35:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 21:35:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-23 21:35:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 21:35:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-23 21:35:54,850 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-23 21:35:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:54,850 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-23 21:35:54,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:35:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-23 21:35:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:35:54,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:54,851 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-23 21:35:54,851 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:54,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-23 21:35:54,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:54,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:54,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:54,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:54,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:55,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:55,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:35:55,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:55,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-23 21:35:55,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:55,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:57,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:57,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 21:35:57,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:35:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:35:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:35:57,148 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-23 21:36:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:00,279 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-23 21:36:00,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:36:00,279 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-23 21:36:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:00,280 INFO L225 Difference]: With dead ends: 131 [2018-09-23 21:36:00,280 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 21:36:00,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-23 21:36:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 21:36:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 21:36:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 21:36:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-23 21:36:00,284 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-23 21:36:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:00,284 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-23 21:36:00,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:36:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-23 21:36:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 21:36:00,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:00,284 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-23 21:36:00,285 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:00,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-23 21:36:00,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:00,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:00,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:00,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:00,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:01,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:36:01,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:01,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:01,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:01,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:01,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:36:01,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:36:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:36:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:36:01,276 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-23 21:36:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:01,439 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-23 21:36:01,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:36:01,439 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-23 21:36:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:01,440 INFO L225 Difference]: With dead ends: 132 [2018-09-23 21:36:01,440 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 21:36:01,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:36:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 21:36:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 21:36:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 21:36:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-23 21:36:01,445 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-23 21:36:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:01,445 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-23 21:36:01,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:36:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-23 21:36:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 21:36:01,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:01,446 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-23 21:36:01,446 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:01,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-23 21:36:01,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:01,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:01,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:01,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:01,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:02,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:02,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:02,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:02,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:02,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:02,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:02,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:02,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:36:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:36:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:36:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:36:02,234 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-23 21:36:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:02,829 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-23 21:36:02,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:36:02,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-23 21:36:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:02,830 INFO L225 Difference]: With dead ends: 134 [2018-09-23 21:36:02,830 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 21:36:02,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:36:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 21:36:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-23 21:36:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 21:36:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-23 21:36:02,835 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-23 21:36:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:02,835 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-23 21:36:02,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:36:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-23 21:36:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:36:02,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:02,836 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-23 21:36:02,836 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:02,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-23 21:36:02,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:02,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:02,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:02,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:04,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:04,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:04,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:04,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:36:04,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:04,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:04,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:04,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:36:04,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:36:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:36:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:36:04,747 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-23 21:36:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:05,637 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-23 21:36:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:36:05,638 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-23 21:36:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:05,639 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:36:05,639 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:36:05,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:36:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:36:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 21:36:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:36:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-23 21:36:05,643 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-23 21:36:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:05,643 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-23 21:36:05,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:36:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-23 21:36:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:36:05,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:05,644 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-23 21:36:05,644 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:05,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-23 21:36:05,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:05,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:05,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:05,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:05,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:06,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:06,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:06,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:06,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-23 21:36:06,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:06,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:06,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:06,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:36:06,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:36:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:36:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:36:06,591 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-23 21:36:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:06,705 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-23 21:36:06,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:36:06,705 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-23 21:36:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:06,707 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:36:06,707 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:36:06,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:36:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:36:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 21:36:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 21:36:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-23 21:36:06,710 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-23 21:36:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-23 21:36:06,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:36:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-23 21:36:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-23 21:36:06,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:06,711 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-23 21:36:06,711 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:06,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-23 21:36:06,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:06,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:06,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:07,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:07,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:07,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:07,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 21:36:07,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:07,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:09,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:09,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 21:36:09,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:36:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:36:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:36:09,159 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-23 21:36:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:12,954 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-23 21:36:12,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:36:12,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-23 21:36:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:12,956 INFO L225 Difference]: With dead ends: 140 [2018-09-23 21:36:12,956 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 21:36:12,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-23 21:36:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 21:36:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 21:36:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 21:36:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-23 21:36:12,961 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-23 21:36:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:12,961 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-23 21:36:12,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:36:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-23 21:36:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:36:12,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:12,961 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-23 21:36:12,962 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:12,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-23 21:36:12,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:12,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:12,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:12,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:12,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:13,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:13,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:13,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:13,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:13,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:13,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:36:13,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:36:13,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:36:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:36:13,790 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-23 21:36:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:13,872 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-23 21:36:13,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:36:13,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-23 21:36:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:13,873 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:36:13,874 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:36:13,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:36:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:36:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 21:36:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 21:36:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-23 21:36:13,878 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-23 21:36:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:13,878 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-23 21:36:13,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:36:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-23 21:36:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:36:13,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:13,878 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-23 21:36:13,879 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:13,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-23 21:36:13,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:13,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:13,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:13,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:13,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:14,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:14,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:14,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:14,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:14,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:14,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:14,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:14,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:36:14,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:36:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:36:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:36:14,908 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-23 21:36:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:14,976 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-23 21:36:14,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:36:14,980 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-23 21:36:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:14,981 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:36:14,981 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:36:14,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:36:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:36:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 21:36:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:36:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-23 21:36:14,985 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-23 21:36:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:14,985 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-23 21:36:14,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:36:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-23 21:36:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 21:36:14,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:14,986 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-23 21:36:14,987 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:14,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-23 21:36:14,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:14,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:14,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:14,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:16,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:16,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:16,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:16,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:16,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:16,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:16,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:16,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:36:16,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:36:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:36:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:36:16,238 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-23 21:36:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:16,363 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-23 21:36:16,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:36:16,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-23 21:36:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:16,365 INFO L225 Difference]: With dead ends: 144 [2018-09-23 21:36:16,365 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 21:36:16,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:36:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 21:36:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 21:36:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 21:36:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-23 21:36:16,370 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-23 21:36:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:16,370 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-23 21:36:16,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:36:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-23 21:36:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 21:36:16,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:16,371 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-23 21:36:16,371 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:16,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-23 21:36:16,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:16,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:16,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:16,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:16,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:17,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:17,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:17,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:36:17,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:17,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:17,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:36:17,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:36:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:36:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:36:17,301 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-23 21:36:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:17,419 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-23 21:36:17,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:36:17,420 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-23 21:36:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:17,420 INFO L225 Difference]: With dead ends: 146 [2018-09-23 21:36:17,421 INFO L226 Difference]: Without dead ends: 142 [2018-09-23 21:36:17,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:36:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-23 21:36:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-23 21:36:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-23 21:36:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-23 21:36:17,425 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-23 21:36:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:17,425 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-23 21:36:17,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:36:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-23 21:36:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 21:36:17,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:17,426 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-23 21:36:17,426 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:17,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-23 21:36:17,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:17,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:17,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:17,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:17,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:18,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:18,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:18,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:18,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-23 21:36:18,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:18,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:18,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:18,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:36:18,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:36:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:36:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:36:18,504 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-23 21:36:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:18,568 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-23 21:36:18,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:36:18,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-23 21:36:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:18,570 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:36:18,570 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:36:18,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:36:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:36:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 21:36:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 21:36:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-23 21:36:18,574 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-23 21:36:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:18,574 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-23 21:36:18,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:36:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-23 21:36:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 21:36:18,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:18,575 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-23 21:36:18,575 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:18,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-23 21:36:18,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:18,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:18,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:18,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:18,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:19,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:19,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:19,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:19,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-23 21:36:19,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:19,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:19,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:19,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:36:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:36:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:36:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:36:19,582 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-23 21:36:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:19,853 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-23 21:36:19,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:36:19,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-23 21:36:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:19,855 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:36:19,855 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 21:36:19,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:36:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 21:36:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 21:36:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 21:36:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-23 21:36:19,862 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-23 21:36:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:19,863 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-23 21:36:19,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:36:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-23 21:36:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 21:36:19,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:19,864 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-23 21:36:19,864 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:19,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-23 21:36:19,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:19,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:19,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:19,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:19,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:20,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:20,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:20,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:20,799 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:20,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:20,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:22,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:22,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 21:36:22,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:36:22,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:36:22,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:36:22,893 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-23 21:36:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:27,490 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-23 21:36:27,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:36:27,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-23 21:36:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:27,491 INFO L225 Difference]: With dead ends: 152 [2018-09-23 21:36:27,492 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 21:36:27,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-23 21:36:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 21:36:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-23 21:36:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 21:36:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-23 21:36:27,496 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-23 21:36:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:27,496 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-23 21:36:27,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:36:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-23 21:36:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:36:27,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:27,497 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-23 21:36:27,497 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:27,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-23 21:36:27,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:27,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:27,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:27,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:28,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:28,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:28,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:28,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:36:28,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:28,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:28,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:28,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:36:28,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:36:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:36:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:36:28,606 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-23 21:36:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:28,682 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-23 21:36:28,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:36:28,682 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-23 21:36:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:28,683 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:36:28,683 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:36:28,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:36:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:36:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 21:36:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:36:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-23 21:36:28,687 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-23 21:36:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:28,687 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-23 21:36:28,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:36:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-23 21:36:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:36:28,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:28,688 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-23 21:36:28,688 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:28,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-23 21:36:28,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:28,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:28,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:28,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:28,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:29,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:29,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:29,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:29,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:29,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:29,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:36:29,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:36:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:36:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:36:29,676 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-23 21:36:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:29,816 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-23 21:36:29,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:36:29,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-23 21:36:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:29,818 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:36:29,818 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:36:29,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:36:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:36:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 21:36:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:36:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-23 21:36:29,822 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-23 21:36:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:29,822 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-23 21:36:29,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:36:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-23 21:36:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-23 21:36:29,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:29,823 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-23 21:36:29,824 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:29,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-23 21:36:29,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:29,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:29,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:29,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:29,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:30,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:30,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:30,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:30,791 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-23 21:36:30,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:30,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:32,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:32,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 21:36:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:36:32,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:36:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:36:32,961 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-23 21:36:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:37,726 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-23 21:36:37,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:36:37,726 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-23 21:36:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:37,727 INFO L225 Difference]: With dead ends: 158 [2018-09-23 21:36:37,727 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 21:36:37,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-23 21:36:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 21:36:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-23 21:36:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 21:36:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-23 21:36:37,731 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-23 21:36:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:37,732 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-23 21:36:37,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:36:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-23 21:36:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:36:37,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:37,733 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-23 21:36:37,733 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:37,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-23 21:36:37,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:37,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:37,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:37,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:37,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:38,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:38,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:38,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:38,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:38,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:38,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:36:38,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:36:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:36:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:36:38,741 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-23 21:36:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:38,874 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-23 21:36:38,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:36:38,875 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-23 21:36:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:38,876 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:36:38,876 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:36:38,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:36:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:36:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 21:36:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:36:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-23 21:36:38,880 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-23 21:36:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:38,880 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-23 21:36:38,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:36:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-23 21:36:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:36:38,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:38,881 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-23 21:36:38,881 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:38,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-23 21:36:38,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:38,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:38,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:38,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:38,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:39,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:39,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:39,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:39,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:39,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:39,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:39,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:39,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:36:39,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:36:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:36:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:36:39,931 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-23 21:36:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:40,027 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-23 21:36:40,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:36:40,028 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-23 21:36:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:40,029 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:36:40,029 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 21:36:40,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:36:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 21:36:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 21:36:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 21:36:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-23 21:36:40,034 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-23 21:36:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:40,034 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-23 21:36:40,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:36:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-23 21:36:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 21:36:40,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:40,035 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-23 21:36:40,035 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:40,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-23 21:36:40,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:40,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:40,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:40,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:40,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:41,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:41,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:41,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:41,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:41,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:41,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:41,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:41,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:36:41,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:36:41,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:36:41,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:36:41,157 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-23 21:36:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:41,353 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-23 21:36:41,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:36:41,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-23 21:36:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:41,354 INFO L225 Difference]: With dead ends: 162 [2018-09-23 21:36:41,354 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 21:36:41,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:36:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 21:36:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-23 21:36:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 21:36:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-23 21:36:41,358 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-23 21:36:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:41,358 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-23 21:36:41,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:36:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-23 21:36:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 21:36:41,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:41,359 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-23 21:36:41,359 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:41,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-23 21:36:41,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:41,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:41,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:41,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:41,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:42,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:42,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:42,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:42,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 21:36:42,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:42,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:42,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:42,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:36:42,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:36:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:36:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:36:42,646 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-23 21:36:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:42,793 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-23 21:36:42,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:36:42,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-23 21:36:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:42,795 INFO L225 Difference]: With dead ends: 164 [2018-09-23 21:36:42,795 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 21:36:42,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:36:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 21:36:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-23 21:36:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 21:36:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-23 21:36:42,800 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-23 21:36:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:42,800 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-23 21:36:42,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:36:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-23 21:36:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:36:42,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:42,802 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-23 21:36:42,802 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:42,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-23 21:36:42,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:42,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:42,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:42,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:42,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:43,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:43,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:43,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:43,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-23 21:36:43,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:43,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:45,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 21:36:45,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 21:36:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 21:36:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:36:45,957 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-23 21:36:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:51,333 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-23 21:36:51,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 21:36:51,333 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-23 21:36:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:51,335 INFO L225 Difference]: With dead ends: 167 [2018-09-23 21:36:51,335 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:36:51,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-23 21:36:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:36:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 21:36:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 21:36:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-23 21:36:51,341 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-23 21:36:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:51,341 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-23 21:36:51,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 21:36:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-23 21:36:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 21:36:51,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:51,342 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-23 21:36:51,342 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:51,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:51,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-23 21:36:51,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:51,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:51,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:51,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:51,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:52,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:52,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:52,696 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:52,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:52,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:52,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:36:52,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:36:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:36:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:36:52,745 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-23 21:36:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:52,884 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-23 21:36:52,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:36:52,884 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-23 21:36:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:52,885 INFO L225 Difference]: With dead ends: 168 [2018-09-23 21:36:52,886 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 21:36:52,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:36:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 21:36:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 21:36:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 21:36:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-23 21:36:52,889 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-23 21:36:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:52,889 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-23 21:36:52,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:36:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-23 21:36:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 21:36:52,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:52,890 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-23 21:36:52,890 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:52,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:52,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-23 21:36:52,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:52,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:52,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:52,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:52,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:53,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:53,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:53,964 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:54,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:54,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:54,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:54,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:54,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:36:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:36:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:36:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:36:54,059 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-23 21:36:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:54,206 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-23 21:36:54,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:36:54,212 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-23 21:36:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:54,213 INFO L225 Difference]: With dead ends: 170 [2018-09-23 21:36:54,213 INFO L226 Difference]: Without dead ends: 166 [2018-09-23 21:36:54,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:36:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-23 21:36:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-23 21:36:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-23 21:36:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-23 21:36:54,217 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-23 21:36:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:54,217 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-23 21:36:54,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:36:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-23 21:36:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 21:36:54,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:54,218 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-23 21:36:54,219 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:54,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-23 21:36:54,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:54,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:55,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:55,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:55,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:55,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 21:36:55,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:55,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:55,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:55,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:36:55,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:36:55,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:36:55,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:36:55,462 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-23 21:36:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:55,545 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-23 21:36:55,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:36:55,546 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-23 21:36:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:55,547 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:36:55,547 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:36:55,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:36:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:36:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 21:36:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 21:36:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-23 21:36:55,552 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-23 21:36:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:55,552 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-23 21:36:55,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:36:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-23 21:36:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 21:36:55,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:55,553 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-23 21:36:55,553 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:55,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-23 21:36:55,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:55,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:55,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:57,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:57,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:57,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 21:36:57,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:57,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:57,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:36:57,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:36:57,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:36:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:36:57,288 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-23 21:36:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:57,446 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-23 21:36:57,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:36:57,447 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-23 21:36:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:57,448 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:36:57,448 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 21:36:57,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:36:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 21:36:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 21:36:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 21:36:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-23 21:36:57,451 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-23 21:36:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:57,451 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-23 21:36:57,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:36:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-23 21:36:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-23 21:36:57,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:57,452 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-23 21:36:57,452 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:57,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-23 21:36:57,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:57,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:57,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:57,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:58,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:58,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:58,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:58,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-23 21:36:58,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:58,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:00,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 21:37:00,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 21:37:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 21:37:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:37:00,962 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-23 21:37:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:06,758 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-23 21:37:06,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 21:37:06,758 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-23 21:37:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:06,759 INFO L225 Difference]: With dead ends: 176 [2018-09-23 21:37:06,759 INFO L226 Difference]: Without dead ends: 172 [2018-09-23 21:37:06,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-23 21:37:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-23 21:37:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-23 21:37:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-23 21:37:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-23 21:37:06,765 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-23 21:37:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:06,765 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-23 21:37:06,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 21:37:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-23 21:37:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:37:06,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:06,766 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-23 21:37:06,766 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:06,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:06,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-23 21:37:06,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:06,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:06,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:06,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:06,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:08,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:08,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:08,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:08,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:37:08,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:37:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:37:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:08,353 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-23 21:37:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:08,678 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-23 21:37:08,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:37:08,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-23 21:37:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:08,679 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:37:08,679 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:37:08,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:37:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 21:37:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:37:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-23 21:37:08,684 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-23 21:37:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:08,684 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-23 21:37:08,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:37:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-23 21:37:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:37:08,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:08,685 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-23 21:37:08,685 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:08,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-23 21:37:08,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:08,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:08,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:08,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:10,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:10,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:10,409 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-23 21:37:10,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:10,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:10,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:37:10,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:37:10,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:37:10,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:10,462 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-23 21:37:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:10,622 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-23 21:37:10,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:37:10,623 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-23 21:37:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:10,624 INFO L225 Difference]: With dead ends: 179 [2018-09-23 21:37:10,624 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 21:37:10,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 21:37:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 21:37:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:37:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-23 21:37:10,628 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-23 21:37:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:10,628 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-23 21:37:10,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:37:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-23 21:37:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 21:37:10,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:10,629 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-23 21:37:10,629 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:10,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-23 21:37:10,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:10,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:10,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:10,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:11,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:11,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:11,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:11,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:11,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:11,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:37:11,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:37:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:37:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:11,948 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-23 21:37:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:12,189 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-23 21:37:12,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:37:12,190 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-23 21:37:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:12,190 INFO L225 Difference]: With dead ends: 180 [2018-09-23 21:37:12,191 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 21:37:12,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 21:37:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-23 21:37:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-23 21:37:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-23 21:37:12,196 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-23 21:37:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:12,196 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-23 21:37:12,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:37:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-23 21:37:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 21:37:12,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:12,197 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-23 21:37:12,197 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:12,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-23 21:37:12,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:12,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:12,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:12,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:13,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:13,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:13,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:13,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:13,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:13,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:37:13,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:37:13,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:37:13,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:13,676 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-23 21:37:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:13,807 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-23 21:37:13,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:37:13,808 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-23 21:37:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:13,809 INFO L225 Difference]: With dead ends: 182 [2018-09-23 21:37:13,809 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 21:37:13,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 21:37:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-23 21:37:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-23 21:37:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-23 21:37:13,814 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-23 21:37:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:13,815 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-23 21:37:13,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:37:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-23 21:37:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 21:37:13,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:13,816 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-23 21:37:13,816 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:13,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-23 21:37:13,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:13,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:13,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:13,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:13,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:15,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:15,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:15,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:15,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-23 21:37:15,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:15,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:18,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:18,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-23 21:37:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-23 21:37:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-23 21:37:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 21:37:18,037 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-23 21:37:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:24,442 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-23 21:37:24,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-23 21:37:24,443 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-23 21:37:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:24,444 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:37:24,444 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 21:37:24,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-23 21:37:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 21:37:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 21:37:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:37:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-23 21:37:24,449 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-23 21:37:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:24,449 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-23 21:37:24,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-23 21:37:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-23 21:37:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-23 21:37:24,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:24,450 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-23 21:37:24,450 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:24,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-23 21:37:24,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:24,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:24,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:24,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:25,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:25,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:25,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:25,874 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:25,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:25,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:25,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:25,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:37:25,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:37:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:37:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:37:25,927 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-23 21:37:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:26,058 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-23 21:37:26,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:37:26,058 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-23 21:37:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:26,059 INFO L225 Difference]: With dead ends: 186 [2018-09-23 21:37:26,059 INFO L226 Difference]: Without dead ends: 182 [2018-09-23 21:37:26,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:37:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-23 21:37:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-23 21:37:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-23 21:37:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-23 21:37:26,062 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-23 21:37:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:26,062 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-23 21:37:26,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:37:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-23 21:37:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-23 21:37:26,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:26,063 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-23 21:37:26,063 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:26,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-23 21:37:26,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:26,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:26,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:26,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:27,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:27,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:27,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:27,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:27,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:27,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:27,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:27,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:37:27,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:37:27,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:37:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:27,709 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-23 21:37:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:27,898 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-23 21:37:27,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:37:27,898 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-23 21:37:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:27,899 INFO L225 Difference]: With dead ends: 188 [2018-09-23 21:37:27,899 INFO L226 Difference]: Without dead ends: 184 [2018-09-23 21:37:27,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-23 21:37:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-23 21:37:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 21:37:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-23 21:37:27,903 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-23 21:37:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:27,903 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-23 21:37:27,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:37:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-23 21:37:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:37:27,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:27,904 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-23 21:37:27,904 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:27,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-23 21:37:27,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:27,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:27,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:29,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:29,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:29,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:29,397 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-23 21:37:29,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:29,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:29,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:29,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:37:29,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:37:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:37:29,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:29,452 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-23 21:37:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:29,565 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-23 21:37:29,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:37:29,566 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-23 21:37:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:29,567 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:37:29,567 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 21:37:29,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 21:37:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 21:37:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:37:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-23 21:37:29,572 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-23 21:37:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:29,572 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-23 21:37:29,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:37:29,572 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-23 21:37:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:37:29,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:29,573 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-23 21:37:29,573 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:29,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-23 21:37:29,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:29,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:29,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:29,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:29,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:30,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:30,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:30,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:31,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-23 21:37:31,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:31,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:31,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:31,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:37:31,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:37:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:37:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:37:31,168 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-23 21:37:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:31,355 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-23 21:37:31,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:37:31,356 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-23 21:37:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:31,357 INFO L225 Difference]: With dead ends: 191 [2018-09-23 21:37:31,357 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 21:37:31,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:37:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 21:37:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 21:37:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 21:37:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-23 21:37:31,361 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-23 21:37:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:31,361 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-23 21:37:31,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:37:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-23 21:37:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-23 21:37:31,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:31,362 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-23 21:37:31,362 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:31,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-23 21:37:31,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:31,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:31,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:31,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:33,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:33,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:33,071 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:33,191 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-23 21:37:33,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:33,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:36,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:36,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-23 21:37:36,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-23 21:37:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-23 21:37:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 21:37:36,014 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-23 21:37:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:43,288 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-23 21:37:43,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-23 21:37:43,289 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-23 21:37:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:43,290 INFO L225 Difference]: With dead ends: 194 [2018-09-23 21:37:43,290 INFO L226 Difference]: Without dead ends: 190 [2018-09-23 21:37:43,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-23 21:37:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-23 21:37:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-23 21:37:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-23 21:37:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-23 21:37:43,295 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-23 21:37:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:43,295 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-23 21:37:43,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-23 21:37:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-23 21:37:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:37:43,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:43,296 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-23 21:37:43,296 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:43,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-23 21:37:43,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:43,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:43,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:44,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:44,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:44,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:44,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:44,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:44,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:37:44,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:37:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:37:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:44,866 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-23 21:37:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:45,063 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-23 21:37:45,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:37:45,063 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-23 21:37:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:45,064 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:37:45,064 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:37:45,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:37:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 21:37:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:37:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-23 21:37:45,069 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-23 21:37:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:45,069 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-23 21:37:45,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:37:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-23 21:37:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:37:45,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:45,071 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-23 21:37:45,071 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:45,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-23 21:37:45,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:45,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:45,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:45,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:45,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:46,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:46,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:46,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:46,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:46,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:46,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:46,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:46,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:37:46,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:37:46,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:37:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:46,660 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-23 21:37:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:46,854 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-23 21:37:46,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:37:46,855 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-23 21:37:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:46,857 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:37:46,857 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 21:37:46,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 21:37:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 21:37:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 21:37:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-23 21:37:46,862 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-23 21:37:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:46,862 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-23 21:37:46,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:37:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-23 21:37:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-23 21:37:46,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:46,863 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-23 21:37:46,863 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:46,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-23 21:37:46,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:46,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:46,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:46,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:48,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:48,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:48,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:48,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:48,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:48,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:48,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:48,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:37:48,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:37:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:37:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:48,801 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-23 21:37:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:48,965 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-23 21:37:48,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:37:48,965 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-23 21:37:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:48,966 INFO L225 Difference]: With dead ends: 198 [2018-09-23 21:37:48,966 INFO L226 Difference]: Without dead ends: 194 [2018-09-23 21:37:48,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-23 21:37:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-23 21:37:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 21:37:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-23 21:37:48,970 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-23 21:37:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:48,970 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-23 21:37:48,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:37:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-23 21:37:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-23 21:37:48,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:48,971 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-23 21:37:48,971 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:48,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-23 21:37:48,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:48,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:48,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:48,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:50,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:50,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:50,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:50,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-23 21:37:50,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:50,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:50,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:50,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:37:50,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:37:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:37:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:50,858 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-23 21:37:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:51,036 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-23 21:37:51,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:37:51,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-23 21:37:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:51,038 INFO L225 Difference]: With dead ends: 200 [2018-09-23 21:37:51,038 INFO L226 Difference]: Without dead ends: 196 [2018-09-23 21:37:51,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-23 21:37:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-23 21:37:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-23 21:37:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-23 21:37:51,042 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-23 21:37:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:51,043 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-23 21:37:51,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:37:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-23 21:37:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 21:37:51,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:51,044 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-23 21:37:51,044 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:51,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-23 21:37:51,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:51,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:51,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:51,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:51,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:52,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:52,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:52,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:52,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-23 21:37:52,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:52,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:56,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:56,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-23 21:37:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-23 21:37:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-23 21:37:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 21:37:56,032 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-23 21:38:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:03,891 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-23 21:38:03,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-23 21:38:03,891 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-23 21:38:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:03,892 INFO L225 Difference]: With dead ends: 203 [2018-09-23 21:38:03,892 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:38:03,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-23 21:38:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:38:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 21:38:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:38:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-23 21:38:03,899 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-23 21:38:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:03,900 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-23 21:38:03,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-23 21:38:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-23 21:38:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-23 21:38:03,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:03,901 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-23 21:38:03,901 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:03,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-23 21:38:03,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:03,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:03,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:03,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:03,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:05,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:05,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:05,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:05,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:05,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:05,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:05,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:05,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:38:05,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:38:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:38:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:38:05,748 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-23 21:38:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:05,862 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-23 21:38:05,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:38:05,862 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-23 21:38:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:05,863 INFO L225 Difference]: With dead ends: 204 [2018-09-23 21:38:05,863 INFO L226 Difference]: Without dead ends: 200 [2018-09-23 21:38:05,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:38:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-23 21:38:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-23 21:38:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-23 21:38:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-23 21:38:05,869 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-23 21:38:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:05,869 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-23 21:38:05,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:38:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-23 21:38:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-23 21:38:05,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:05,870 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-23 21:38:05,870 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:05,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-23 21:38:05,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:05,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:05,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:05,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:07,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:07,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:07,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:07,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-23 21:38:07,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:07,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:07,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:07,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:38:07,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:38:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:38:07,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:07,688 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-23 21:38:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:07,873 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-23 21:38:07,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:38:07,874 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-23 21:38:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:07,874 INFO L225 Difference]: With dead ends: 206 [2018-09-23 21:38:07,875 INFO L226 Difference]: Without dead ends: 202 [2018-09-23 21:38:07,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-23 21:38:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-23 21:38:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-23 21:38:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-23 21:38:07,879 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-23 21:38:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:07,880 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-23 21:38:07,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:38:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-23 21:38:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 21:38:07,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:07,880 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-23 21:38:07,881 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:07,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-23 21:38:07,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:07,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:07,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:07,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:07,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:09,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:09,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:09,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:09,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-23 21:38:09,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:09,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:10,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:10,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:38:10,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:38:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:38:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:10,034 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-23 21:38:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:10,213 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-23 21:38:10,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:38:10,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-23 21:38:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:10,215 INFO L225 Difference]: With dead ends: 207 [2018-09-23 21:38:10,215 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 21:38:10,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 21:38:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 21:38:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 21:38:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-23 21:38:10,218 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-23 21:38:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:10,219 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-23 21:38:10,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:38:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-23 21:38:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 21:38:10,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:10,220 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-23 21:38:10,220 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:10,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-23 21:38:10,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:10,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:10,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:10,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:10,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:11,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:11,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:11,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:11,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:12,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:12,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:38:12,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:38:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:38:12,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:38:12,050 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-23 21:38:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:12,209 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-23 21:38:12,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:38:12,209 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-23 21:38:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:12,210 INFO L225 Difference]: With dead ends: 209 [2018-09-23 21:38:12,210 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 21:38:12,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:38:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 21:38:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 21:38:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 21:38:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-23 21:38:12,216 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-23 21:38:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:12,216 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-23 21:38:12,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:38:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-23 21:38:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 21:38:12,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:12,217 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-23 21:38:12,217 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:12,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-23 21:38:12,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:12,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:12,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:12,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:14,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:14,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:14,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:14,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-23 21:38:14,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:14,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:17,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:17,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-23 21:38:17,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-23 21:38:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-23 21:38:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 21:38:17,644 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-23 21:38:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:26,093 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-23 21:38:26,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-23 21:38:26,093 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-23 21:38:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:26,094 INFO L225 Difference]: With dead ends: 212 [2018-09-23 21:38:26,094 INFO L226 Difference]: Without dead ends: 208 [2018-09-23 21:38:26,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-23 21:38:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-23 21:38:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-23 21:38:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-23 21:38:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-23 21:38:26,099 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-23 21:38:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:26,100 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-23 21:38:26,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-23 21:38:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-23 21:38:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 21:38:26,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:26,101 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-23 21:38:26,101 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:26,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-23 21:38:26,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:26,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:26,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:27,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:27,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:27,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:27,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:27,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:27,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:38:27,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:38:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:38:27,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:38:27,912 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-23 21:38:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:28,045 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-23 21:38:28,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:38:28,045 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-23 21:38:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:28,046 INFO L225 Difference]: With dead ends: 213 [2018-09-23 21:38:28,046 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 21:38:28,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:38:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 21:38:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-23 21:38:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 21:38:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-23 21:38:28,052 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-23 21:38:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:28,052 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-23 21:38:28,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:38:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-23 21:38:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 21:38:28,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:28,053 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-23 21:38:28,053 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:28,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-23 21:38:28,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:28,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:28,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:28,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:28,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:30,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:30,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:30,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:30,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:30,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:30,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:30,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:30,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:38:30,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:38:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:38:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:30,203 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-23 21:38:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:30,413 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-23 21:38:30,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:38:30,413 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-23 21:38:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:30,414 INFO L225 Difference]: With dead ends: 215 [2018-09-23 21:38:30,414 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 21:38:30,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 21:38:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 21:38:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 21:38:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-23 21:38:30,418 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-23 21:38:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:30,418 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-23 21:38:30,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:38:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-23 21:38:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-23 21:38:30,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:30,419 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-23 21:38:30,419 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:30,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-23 21:38:30,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:30,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:30,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:32,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:32,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:32,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:32,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:32,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:32,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:32,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:32,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:38:32,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:38:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:38:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:32,374 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-23 21:38:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:32,596 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-23 21:38:32,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:38:32,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-23 21:38:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:32,597 INFO L225 Difference]: With dead ends: 216 [2018-09-23 21:38:32,597 INFO L226 Difference]: Without dead ends: 212 [2018-09-23 21:38:32,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-23 21:38:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-23 21:38:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-23 21:38:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-23 21:38:32,600 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-23 21:38:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:32,600 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-23 21:38:32,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:38:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-23 21:38:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-23 21:38:32,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:32,601 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-23 21:38:32,601 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:32,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-23 21:38:32,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:32,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:32,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:32,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:34,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:34,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:34,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:34,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 21:38:34,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:34,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:34,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:34,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:38:34,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:38:34,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:38:34,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:38:34,877 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-23 21:38:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:35,104 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-23 21:38:35,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:38:35,104 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-23 21:38:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:35,105 INFO L225 Difference]: With dead ends: 218 [2018-09-23 21:38:35,105 INFO L226 Difference]: Without dead ends: 214 [2018-09-23 21:38:35,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:38:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-23 21:38:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-23 21:38:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-23 21:38:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-23 21:38:35,110 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-23 21:38:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:35,110 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-23 21:38:35,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:38:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-23 21:38:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-23 21:38:35,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:35,111 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-23 21:38:35,111 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:35,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-23 21:38:35,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:35,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:35,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:36,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:36,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:36,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:37,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-23 21:38:37,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:37,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 21:38:39,590 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 21:38:39,791 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:39,791 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:38:39,797 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:38:39,797 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:38:39 BoogieIcfgContainer [2018-09-23 21:38:39,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:38:39,798 INFO L168 Benchmark]: Toolchain (without parser) took 234771.98 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 316.7 MB). Peak memory consumption was 624.0 MB. Max. memory is 7.1 GB. [2018-09-23 21:38:39,799 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:38:39,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:38:39,800 INFO L168 Benchmark]: Boogie Preprocessor took 23.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:38:39,800 INFO L168 Benchmark]: RCFGBuilder took 279.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:38:39,800 INFO L168 Benchmark]: TraceAbstraction took 234416.21 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 295.6 MB). Peak memory consumption was 602.8 MB. Max. memory is 7.1 GB. [2018-09-23 21:38:39,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 279.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234416.21 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 295.6 MB). Peak memory consumption was 602.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 122 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 234.3s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 88.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 192.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, 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: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 127.6s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-38-39-811.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-38-39-811.csv Completed graceful shutdown