java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:35:49,077 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:35:49,079 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:35:49,095 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:35:49,095 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:35:49,097 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:35:49,098 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:35:49,100 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:35:49,101 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:35:49,102 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:35:49,103 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:35:49,103 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:35:49,104 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:35:49,105 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:35:49,106 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:35:49,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:35:49,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:35:49,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:35:49,112 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:35:49,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:35:49,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:35:49,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:35:49,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:35:49,128 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 [2018-10-04 12:35:49,144 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:35:49,144 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:35:49,145 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:35:49,145 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:35:49,146 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:35:49,146 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:35:49,146 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:35:49,146 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:35:49,147 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:35:49,147 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:35:49,147 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:35:49,147 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:35:49,147 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:35:49,148 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:35:49,148 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:35:49,148 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:35:49,148 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:35:49,148 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:35:49,149 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:35:49,149 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:35:49,149 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:35:49,149 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:35:49,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:35:49,149 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:35:49,150 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:35:49,150 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:35:49,150 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:35:49,150 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:35:49,150 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:35:49,151 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:35:49,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:35:49,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:35:49,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:35:49,243 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:35:49,245 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:35:49,246 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-04 12:35:49,246 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-04 12:35:49,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:35:49,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:35:49,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:35:49,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:35:49,297 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:35:49,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,332 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:35:49,332 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:35:49,332 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:35:49,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:35:49,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:35:49,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:35:49,336 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:35:49,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... [2018-10-04 12:35:49,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:35:49,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:35:49,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:35:49,356 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:35:49,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:35:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-04 12:35:49,421 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-04 12:35:49,686 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:35:49,686 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:35:49 BoogieIcfgContainer [2018-10-04 12:35:49,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:35:49,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:35:49,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:35:49,691 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:35:49,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:35:49" (1/2) ... [2018-10-04 12:35:49,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b10684 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:35:49, skipping insertion in model container [2018-10-04 12:35:49,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:35:49" (2/2) ... [2018-10-04 12:35:49,695 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-04 12:35:49,705 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:35:49,713 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-04 12:35:49,766 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:35:49,766 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:35:49,767 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:35:49,767 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:35:49,767 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:35:49,767 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:35:49,768 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:35:49,768 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:35:49,768 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:35:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:35:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:35:49,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:49,796 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:35:49,797 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:49,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-04 12:35:49,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:49,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:49,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:49,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:49,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:49,934 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:35:49,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:35:49,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:35:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:35:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:35:49,953 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-04 12:35:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,039 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 12:35:50,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:35:50,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:35:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,050 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:35:50,051 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:35:50,055 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 [2018-10-04 12:35:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:35:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:35:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:35:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 12:35:50,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-04 12:35:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,093 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 12:35:50,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:35:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 12:35:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:35:50,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,094 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:35:50,095 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-04 12:35:50,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:35:50,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:35:50,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:35:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:35:50,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:35:50,137 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-04 12:35:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,195 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:35:50,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:35:50,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 12:35:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,198 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:35:50,198 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:35:50,199 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 [2018-10-04 12:35:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:35:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:35:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:35:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-04 12:35:50,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-04 12:35:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,203 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-04 12:35:50,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:35:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-04 12:35:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:35:50,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,211 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:35:50,212 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,212 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-04 12:35:50,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,312 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:35:50,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:35:50,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:35:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:35:50,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:35:50,313 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-04 12:35:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,385 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:35:50,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:35:50,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:35:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,386 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:35:50,386 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:35:50,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:35:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:35:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:35:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:35:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-04 12:35:50,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-04 12:35:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,390 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-04 12:35:50,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:35:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-04 12:35:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:35:50,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,391 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:50,392 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-04 12:35:50,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:50,500 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 [2018-10-04 12:35:50,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:50,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 12:35:50,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:35:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:35:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:35:50,631 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-04 12:35:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,795 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-04 12:35:50,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:35:50,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 12:35:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,797 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:35:50,797 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:35:50,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:35:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:35:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-04 12:35:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:35:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 12:35:50,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-04 12:35:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,801 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 12:35:50,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:35:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 12:35:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:35:50,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,803 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:50,803 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-04 12:35:50,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:50,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 12:35:50,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:50,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:50,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:50,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:50,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:35:50,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:35:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:35:50,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:50,947 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-04 12:35:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:51,055 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-04 12:35:51,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:35:51,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:35:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:51,057 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:35:51,057 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:35:51,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:35:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:35:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:35:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:35:51,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-04 12:35:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:51,063 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:35:51,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:35:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:35:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:35:51,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:51,066 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:51,066 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:51,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-04 12:35:51,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:51,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:51,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:51,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:51,260 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 [2018-10-04 12:35:51,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:51,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-04 12:35:51,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:51,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:51,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:35:51,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:35:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:35:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:51,354 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 12:35:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:51,432 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:35:51,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:35:51,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:35:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:51,434 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:35:51,435 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:35:51,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:35:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:35:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:35:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-04 12:35:51,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-04 12:35:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:51,439 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-04 12:35:51,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:35:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-04 12:35:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:35:51,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:51,440 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:35:51,441 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:51,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-04 12:35:51,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:51,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:51,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:51,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:51,550 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 [2018-10-04 12:35:51,562 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:51,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:51,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:51,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:51,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:35:51,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:35:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:35:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:51,619 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-04 12:35:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:51,706 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-04 12:35:51,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:35:51,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-04 12:35:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:51,709 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:35:51,709 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:35:51,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:35:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:35:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-04 12:35:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:35:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 12:35:51,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 12:35:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:51,718 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 12:35:51,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:35:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 12:35:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:35:51,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:51,719 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 12:35:51,719 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:51,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-04 12:35:51,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:51,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:51,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:51,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:51,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:51,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:51,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-04 12:35:51,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:51,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:51,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:51,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:35:51,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:35:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:35:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:51,868 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-04 12:35:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:51,949 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-04 12:35:51,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:35:51,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:35:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:51,950 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:35:51,950 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:35:51,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:35:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:35:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:35:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:35:51,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-04 12:35:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:51,955 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:35:51,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:35:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:35:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:35:51,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:51,956 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 12:35:51,956 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:51,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-04 12:35:51,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:51,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:51,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:51,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:52,021 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 [2018-10-04 12:35:52,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:52,077 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-04 12:35:52,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:52,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:52,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:35:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:35:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:35:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:52,111 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 12:35:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:52,147 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-04 12:35:52,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:35:52,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:35:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:52,149 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:35:52,149 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:35:52,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:35:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:35:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:35:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-04 12:35:52,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-04 12:35:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:52,153 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-04 12:35:52,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:35:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-04 12:35:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:35:52,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:52,154 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:35:52,154 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:52,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-04 12:35:52,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:52,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:52,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:52,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:52,270 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 [2018-10-04 12:35:52,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:52,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:52,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:35:52,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:35:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:35:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:52,320 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-04 12:35:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:52,677 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 12:35:52,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:35:52,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 12:35:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:52,678 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:35:52,679 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:35:52,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:35:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:35:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 12:35:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:35:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:35:52,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 12:35:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:52,684 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:35:52,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:35:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:35:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:35:52,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:52,685 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 12:35:52,685 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:52,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-04 12:35:52,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:52,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:52,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:52,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:52,775 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 [2018-10-04 12:35:52,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:52,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:52,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:52,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:52,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:35:52,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:35:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:35:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:52,833 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-04 12:35:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:52,895 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-04 12:35:52,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:35:52,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:35:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:52,896 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:35:52,896 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:35:52,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:35:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:35:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:35:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 12:35:52,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-04 12:35:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:52,902 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 12:35:52,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:35:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 12:35:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:35:52,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:52,903 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 12:35:52,903 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:52,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-04 12:35:52,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:52,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:52,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:52,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:52,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:52,993 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 [2018-10-04 12:35:53,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:53,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:35:53,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:53,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:53,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:35:53,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:35:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:35:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:53,059 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-04 12:35:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:53,092 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 12:35:53,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:35:53,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:35:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:53,094 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:35:53,094 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:35:53,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:35:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:35:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:35:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-04 12:35:53,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-04 12:35:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:53,099 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-04 12:35:53,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:35:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-04 12:35:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:35:53,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:53,100 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:35:53,100 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:53,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-04 12:35:53,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:53,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:53,259 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 [2018-10-04 12:35:53,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:53,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:53,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:53,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:53,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:35:53,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:35:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:35:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:53,320 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-04 12:35:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:53,398 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-04 12:35:53,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:35:53,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-04 12:35:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:53,400 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:35:53,400 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:35:53,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:35:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:35:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-04 12:35:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:35:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 12:35:53,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-04 12:35:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:53,406 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 12:35:53,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:35:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 12:35:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:35:53,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:53,407 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 12:35:53,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:53,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-04 12:35:53,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:53,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:53,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:53,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:53,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:53,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:53,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:35:53,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:53,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:53,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:35:53,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:35:53,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:35:53,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:53,696 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-04 12:35:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:53,785 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-04 12:35:53,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:35:53,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:35:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:53,785 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:35:53,786 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:35:53,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:35:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:35:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:35:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 12:35:53,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-04 12:35:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:53,789 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 12:35:53,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:35:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 12:35:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:35:53,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:53,790 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 12:35:53,791 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:53,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:53,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-04 12:35:53,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:53,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:53,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:53,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:53,890 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 [2018-10-04 12:35:53,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:53,915 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:35:53,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:53,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:53,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:35:53,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:35:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:35:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:53,945 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 12:35:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:54,003 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-04 12:35:54,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:35:54,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:35:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:54,005 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:35:54,005 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:35:54,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:35:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:35:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:35:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-04 12:35:54,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-04 12:35:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:54,009 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-04 12:35:54,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:35:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-04 12:35:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:35:54,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:54,010 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:35:54,010 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:54,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-04 12:35:54,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:54,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:54,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:54,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:54,158 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 [2018-10-04 12:35:54,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:54,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:35:54,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:35:54,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:35:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:54,236 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-04 12:35:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:54,364 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 12:35:54,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:35:54,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-04 12:35:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:54,365 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:35:54,365 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:35:54,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:35:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:35:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 12:35:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:35:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-04 12:35:54,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-04 12:35:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:54,370 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-04 12:35:54,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:35:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-04 12:35:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:35:54,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:54,371 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 12:35:54,372 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:54,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-04 12:35:54,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:54,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:54,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:54,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:54,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:54,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:54,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:54,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:54,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:54,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:35:54,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:35:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:35:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:54,544 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-04 12:35:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:54,592 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-04 12:35:54,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:35:54,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:35:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:54,594 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:35:54,594 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:35:54,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:35:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:35:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:35:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 12:35:54,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-04 12:35:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:54,599 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 12:35:54,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:35:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 12:35:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:35:54,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:54,600 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 12:35:54,600 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:54,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-04 12:35:54,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:54,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:54,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:54,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:54,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:35:54,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:54,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:54,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:35:54,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:35:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:35:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:54,781 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 12:35:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:54,831 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 12:35:54,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:35:54,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:35:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:54,832 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:35:54,833 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:35:54,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:35:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:35:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:35:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-04 12:35:54,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-04 12:35:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-04 12:35:54,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:35:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-04 12:35:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:35:54,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:54,840 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:35:54,841 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:54,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-04 12:35:54,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:54,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:54,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:54,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:54,969 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 [2018-10-04 12:35:54,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:55,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:55,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:55,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:55,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:35:55,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:35:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:35:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:55,103 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-04 12:35:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:55,373 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-04 12:35:55,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:35:55,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-04 12:35:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:55,375 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:35:55,375 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:35:55,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:35:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:35:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-04 12:35:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:35:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 12:35:55,381 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 12:35:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:55,381 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 12:35:55,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:35:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 12:35:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:35:55,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:55,382 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 12:35:55,383 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:55,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-04 12:35:55,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:55,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:55,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:55,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:55,689 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 [2018-10-04 12:35:55,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:55,741 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 12:35:55,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:55,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:55,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:35:55,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:35:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:35:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:55,782 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-04 12:35:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:55,863 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-04 12:35:55,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:35:55,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:35:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:55,864 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:35:55,864 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:35:55,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:35:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:35:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:35:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 12:35:55,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-04 12:35:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:55,869 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 12:35:55,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:35:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 12:35:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:35:55,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:55,869 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 12:35:55,870 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:55,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-04 12:35:55,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:55,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:55,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:55,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:55,981 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 [2018-10-04 12:35:55,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:55,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:35:55,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:56,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:56,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:56,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:35:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:35:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:35:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:56,031 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 12:35:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:56,066 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-04 12:35:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:35:56,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:35:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:56,068 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:35:56,068 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:35:56,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:35:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:35:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:35:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-04 12:35:56,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-04 12:35:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:56,072 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-04 12:35:56,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:35:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-04 12:35:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:35:56,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:56,073 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:35:56,073 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:56,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-04 12:35:56,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:56,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:56,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:56,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:56,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:56,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:56,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:56,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:56,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:56,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:56,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:35:56,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:35:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:35:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:56,359 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-04 12:35:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:56,657 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 12:35:56,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:35:56,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-04 12:35:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:56,658 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:35:56,658 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:35:56,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:35:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:35:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-04 12:35:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:35:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 12:35:56,662 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-04 12:35:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:56,662 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 12:35:56,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:35:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 12:35:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:35:56,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:56,663 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 12:35:56,663 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:56,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-04 12:35:56,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:56,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:56,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:56,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:56,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:56,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:56,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:56,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:57,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:57,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:35:57,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:35:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:35:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:57,023 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-04 12:35:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:57,083 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-04 12:35:57,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:35:57,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:35:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:57,084 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:35:57,084 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:35:57,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:35:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:35:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:35:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 12:35:57,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-04 12:35:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:57,089 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 12:35:57,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:35:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 12:35:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:35:57,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:57,090 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 12:35:57,091 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:57,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:57,091 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-04 12:35:57,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:57,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:57,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:57,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:57,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:57,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:57,275 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 [2018-10-04 12:35:57,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:57,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 12:35:57,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:57,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:57,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:57,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:35:57,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:35:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:35:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:57,382 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-04 12:35:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:57,462 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 12:35:57,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:35:57,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:35:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:57,463 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:35:57,463 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:35:57,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:35:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:35:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:35:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-04 12:35:57,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-04 12:35:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-04 12:35:57,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:35:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-04 12:35:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:35:57,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:57,469 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:35:57,469 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:57,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-04 12:35:57,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:57,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:57,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:57,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:57,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:57,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:57,612 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 [2018-10-04 12:35:57,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:57,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:57,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:57,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:57,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:57,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:35:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:35:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:35:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:57,690 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-04 12:35:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:58,076 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-04 12:35:58,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:35:58,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-04 12:35:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:58,078 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:35:58,078 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:35:58,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:35:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:35:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-04 12:35:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:35:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 12:35:58,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-04 12:35:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:58,085 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 12:35:58,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:35:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 12:35:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:35:58,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:58,086 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 12:35:58,086 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:58,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-04 12:35:58,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:58,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:58,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:58,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:58,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:58,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:58,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:35:58,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:58,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:58,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:35:58,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:35:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:35:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:58,590 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-04 12:35:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:58,661 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-04 12:35:58,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:35:58,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:35:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:58,662 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:35:58,662 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:35:58,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:35:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:35:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:35:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 12:35:58,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-04 12:35:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:58,668 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 12:35:58,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:35:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 12:35:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:35:58,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:58,669 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 12:35:58,669 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:58,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-04 12:35:58,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:58,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:58,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:58,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:58,795 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 [2018-10-04 12:35:58,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:58,820 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 12:35:58,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:58,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:58,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:35:58,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:35:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:35:58,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:58,861 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 12:35:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:58,913 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-04 12:35:58,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:35:58,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:35:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:58,914 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:35:58,914 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:35:58,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:35:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:35:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:35:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-04 12:35:58,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-04 12:35:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:58,918 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-04 12:35:58,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:35:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-04 12:35:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:35:58,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:58,919 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:35:58,919 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:58,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-04 12:35:58,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:58,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:58,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:58,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:59,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:59,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:59,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:59,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:59,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:59,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:35:59,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:35:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:35:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:59,465 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-04 12:35:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:59,647 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 12:35:59,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:35:59,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-04 12:35:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:59,649 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:35:59,649 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:35:59,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:35:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:35:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 12:35:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:35:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 12:35:59,654 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-04 12:35:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:59,655 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 12:35:59,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:35:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 12:35:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:35:59,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:59,656 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 12:35:59,656 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:59,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-04 12:35:59,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:59,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:59,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:59,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:59,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:59,812 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 [2018-10-04 12:35:59,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:59,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:59,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:59,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:59,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:59,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:35:59,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:35:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:35:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:35:59,869 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-04 12:35:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:59,926 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-04 12:35:59,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:35:59,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:35:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:59,927 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:35:59,927 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:35:59,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:35:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:35:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:35:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:35:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 12:35:59,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-04 12:35:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:59,932 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 12:35:59,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:35:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 12:35:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:35:59,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:59,933 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 12:35:59,934 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:59,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-04 12:35:59,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:59,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:59,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:59,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:59,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:00,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:00,044 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 [2018-10-04 12:36:00,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:00,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:36:00,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:00,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:00,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:00,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:36:00,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:36:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:36:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:00,117 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-04 12:36:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:00,164 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 12:36:00,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:36:00,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:36:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:00,165 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:36:00,166 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:36:00,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:36:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:36:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:36:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-04 12:36:00,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-04 12:36:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:00,171 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-04 12:36:00,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:36:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-04 12:36:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:36:00,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:00,171 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:36:00,172 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:00,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-04 12:36:00,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:00,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:00,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:00,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:00,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:00,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:00,473 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 [2018-10-04 12:36:00,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:00,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:00,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:00,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:00,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:00,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:36:00,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:36:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:36:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:00,533 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-04 12:36:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:00,770 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-04 12:36:00,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:36:00,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-04 12:36:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:00,771 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:36:00,771 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:36:00,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:36:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-04 12:36:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:36:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 12:36:00,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-04 12:36:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:00,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 12:36:00,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:36:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 12:36:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:36:00,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:00,776 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 12:36:00,777 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:00,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:00,777 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-04 12:36:00,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:00,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:00,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:00,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:00,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:01,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:01,107 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 [2018-10-04 12:36:01,115 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:01,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:36:01,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:01,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:01,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:01,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:36:01,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:36:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:36:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:01,181 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 12:36:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:01,296 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-04 12:36:01,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:36:01,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:36:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:01,297 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:36:01,297 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:36:01,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:36:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:36:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:36:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 12:36:01,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-04 12:36:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:01,301 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 12:36:01,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:36:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 12:36:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:36:01,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:01,302 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 12:36:01,302 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:01,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:01,303 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-04 12:36:01,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:01,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:01,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:01,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:01,967 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 [2018-10-04 12:36:01,978 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:01,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:36:01,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:01,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:02,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:02,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:36:02,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:36:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:36:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:02,035 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 12:36:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:02,091 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-04 12:36:02,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:36:02,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:36:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:02,092 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:36:02,092 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:36:02,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:36:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:36:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:36:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-04 12:36:02,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-04 12:36:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:02,097 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-04 12:36:02,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:36:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-04 12:36:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:36:02,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:02,098 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:36:02,099 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:02,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:02,099 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-04 12:36:02,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:02,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:02,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:02,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:02,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:02,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:02,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:02,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:02,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:02,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:02,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:36:02,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:36:02,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:36:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:02,392 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-04 12:36:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:02,676 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 12:36:02,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:36:02,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 12:36:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:02,677 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:36:02,677 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:36:02,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:36:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 12:36:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:36:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 12:36:02,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-04 12:36:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:02,683 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 12:36:02,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:36:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 12:36:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:36:02,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:02,684 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 12:36:02,684 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:02,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-04 12:36:02,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:02,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:02,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:02,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:02,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:03,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:03,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:03,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:03,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:03,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:03,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:36:03,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:36:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:36:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:03,097 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-04 12:36:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:03,204 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-04 12:36:03,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:36:03,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:36:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:03,207 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:36:03,207 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:36:03,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:36:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:36:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:36:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 12:36:03,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-04 12:36:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:03,210 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 12:36:03,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:36:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 12:36:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:36:03,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:03,211 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 12:36:03,211 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:03,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-04 12:36:03,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:03,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:03,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:03,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:03,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:03,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:03,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 12:36:03,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:03,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:03,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:36:03,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:36:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:36:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:03,470 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-04 12:36:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:03,788 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 12:36:03,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:36:03,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:36:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:03,789 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:36:03,789 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:36:03,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:36:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:36:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:36:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-04 12:36:03,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-04 12:36:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:03,793 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-04 12:36:03,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:36:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-04 12:36:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:36:03,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:03,794 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:36:03,794 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:03,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-04 12:36:03,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:03,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:03,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:03,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:04,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:04,263 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 [2018-10-04 12:36:04,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:04,288 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:04,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:04,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:04,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:04,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:36:04,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:36:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:36:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:04,318 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-04 12:36:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:04,740 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-04 12:36:04,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:36:04,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-04 12:36:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:04,741 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:36:04,742 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:36:04,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:36:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-04 12:36:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:36:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 12:36:04,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 12:36:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:04,746 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 12:36:04,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:36:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 12:36:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:36:04,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:04,747 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 12:36:04,747 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:04,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:04,748 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-04 12:36:04,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:04,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:04,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:04,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:04,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:05,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:05,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:05,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 12:36:05,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:05,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:05,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:36:05,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:36:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:36:05,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:05,193 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-04 12:36:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:05,263 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-04 12:36:05,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:36:05,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:36:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:05,264 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:36:05,264 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:36:05,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:36:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:36:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:36:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 12:36:05,268 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-04 12:36:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:05,268 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 12:36:05,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:36:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 12:36:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:36:05,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:05,269 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 12:36:05,269 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:05,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-04 12:36:05,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:05,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:05,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:05,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:05,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:05,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:05,435 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:05,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 12:36:05,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:05,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:05,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:36:05,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:36:05,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:36:05,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:05,490 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 12:36:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:05,535 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-04 12:36:05,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:36:05,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:36:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:05,536 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:36:05,536 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:36:05,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:36:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:36:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:36:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-04 12:36:05,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-04 12:36:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:05,540 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-04 12:36:05,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:36:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-04 12:36:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:36:05,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:05,541 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:36:05,541 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:05,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-04 12:36:05,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:05,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:05,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:05,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:05,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:05,893 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 [2018-10-04 12:36:05,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:05,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:05,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:05,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:36:05,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:36:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:36:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:05,951 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-04 12:36:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:06,283 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 12:36:06,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:36:06,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-04 12:36:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:06,284 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:36:06,284 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:36:06,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:36:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 12:36:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:36:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 12:36:06,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-04 12:36:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:06,289 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 12:36:06,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:36:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 12:36:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:36:06,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:06,289 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 12:36:06,290 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:06,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-04 12:36:06,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:06,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:06,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:06,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:06,789 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 [2018-10-04 12:36:06,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:06,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:06,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:06,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:06,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:06,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:36:06,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:36:06,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:36:06,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:06,856 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-04 12:36:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:06,976 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-04 12:36:06,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:36:06,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:36:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:06,977 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:36:06,977 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:36:06,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:36:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:36:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:36:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 12:36:06,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-04 12:36:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:06,981 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 12:36:06,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:36:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 12:36:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:36:06,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:06,981 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 12:36:06,982 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:06,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-04 12:36:06,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:06,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:06,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:06,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:06,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:07,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:07,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:07,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 12:36:07,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:07,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:07,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:36:07,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:36:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:36:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:07,205 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-04 12:36:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:07,351 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 12:36:07,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:36:07,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:36:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:07,352 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:36:07,352 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:36:07,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:36:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:36:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:36:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-04 12:36:07,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-04 12:36:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:07,356 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-04 12:36:07,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:36:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-04 12:36:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:36:07,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:07,356 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:36:07,357 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:07,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-04 12:36:07,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:07,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:07,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:07,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:07,599 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:07,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:07,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:07,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:36:07,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:36:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:36:07,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:07,636 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-04 12:36:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:07,958 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-04 12:36:07,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:36:07,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-04 12:36:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:07,959 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:36:07,960 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:36:07,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:36:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-04 12:36:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:36:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 12:36:07,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-04 12:36:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:07,964 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 12:36:07,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:36:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 12:36:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:36:07,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:07,965 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 12:36:07,965 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:07,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-04 12:36:07,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:07,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:07,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:07,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:08,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:08,384 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 [2018-10-04 12:36:08,392 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:08,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 12:36:08,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:08,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:08,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:08,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:36:08,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:36:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:36:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:08,461 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-04 12:36:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:08,562 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-04 12:36:08,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:36:08,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:36:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:08,563 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:36:08,563 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:36:08,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:36:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:36:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:36:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 12:36:08,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-04 12:36:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:08,568 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 12:36:08,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:36:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 12:36:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:36:08,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:08,568 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 12:36:08,568 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:08,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-04 12:36:08,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:08,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:08,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:08,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:08,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:08,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:08,792 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 [2018-10-04 12:36:08,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:08,820 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 12:36:08,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:08,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:08,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:08,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:36:08,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:36:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:36:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:08,849 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 12:36:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:08,920 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-04 12:36:08,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:36:08,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:36:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:08,921 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:36:08,921 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:36:08,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:36:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:36:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:36:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-04 12:36:08,925 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-04 12:36:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:08,926 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-04 12:36:08,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:36:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-04 12:36:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:36:08,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:08,926 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:36:08,927 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:08,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-04 12:36:08,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:08,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:08,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:08,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:08,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:09,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:09,198 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 [2018-10-04 12:36:09,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:09,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:09,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:09,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:36:09,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:36:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:36:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:09,274 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-04 12:36:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:09,750 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 12:36:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:36:09,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-04 12:36:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:09,751 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:36:09,751 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:36:09,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:36:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-04 12:36:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:36:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 12:36:09,756 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-04 12:36:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:09,756 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 12:36:09,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:36:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 12:36:09,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:36:09,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:09,757 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 12:36:09,757 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:09,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-04 12:36:09,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:09,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:09,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:09,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:09,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:10,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:10,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:10,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:10,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:10,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:10,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:36:10,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:36:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:36:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:10,061 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-04 12:36:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:10,140 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-04 12:36:10,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:36:10,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:36:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:10,141 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:36:10,141 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:36:10,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:36:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:36:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:36:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 12:36:10,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-04 12:36:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:10,145 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 12:36:10,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:36:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 12:36:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:36:10,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:10,146 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 12:36:10,146 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:10,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-04 12:36:10,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:10,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:10,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:10,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:10,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:10,331 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 [2018-10-04 12:36:10,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:10,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:36:10,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:10,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:10,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:36:10,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:36:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:36:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:10,396 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-04 12:36:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:10,466 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 12:36:10,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:36:10,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:36:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:10,467 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:36:10,467 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:36:10,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:36:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:36:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:36:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-04 12:36:10,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-04 12:36:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-04 12:36:10,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:36:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-04 12:36:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:36:10,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:10,473 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:36:10,473 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:10,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-04 12:36:10,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:10,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:10,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:10,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:10,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:10,858 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 [2018-10-04 12:36:10,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:10,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:10,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:10,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:10,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:10,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:36:10,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:36:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:36:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:10,916 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-04 12:36:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:11,736 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-04 12:36:11,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:36:11,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-04 12:36:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:11,737 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:36:11,737 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:36:11,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:36:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-04 12:36:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:36:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 12:36:11,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-04 12:36:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:11,741 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 12:36:11,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:36:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 12:36:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:36:11,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:11,742 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 12:36:11,742 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:11,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-04 12:36:11,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:11,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:11,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:11,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:11,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:11,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:11,952 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 [2018-10-04 12:36:11,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:11,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:36:11,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:11,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:12,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:12,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:36:12,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:36:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:36:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:12,030 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-04 12:36:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:12,518 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-04 12:36:12,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:36:12,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:36:12,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:12,519 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:36:12,520 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:36:12,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:36:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:36:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:36:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 12:36:12,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-04 12:36:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:12,523 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 12:36:12,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:36:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 12:36:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:36:12,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:12,524 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 12:36:12,524 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:12,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-04 12:36:12,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:12,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:12,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:12,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:12,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:12,728 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 [2018-10-04 12:36:12,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:12,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:36:12,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:12,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:12,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:12,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:36:12,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:36:12,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:36:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:12,792 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 12:36:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:12,926 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-04 12:36:12,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:36:12,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:36:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:12,927 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:36:12,927 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:36:12,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:36:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:36:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:36:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-04 12:36:12,931 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-04 12:36:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:12,931 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-04 12:36:12,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:36:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-04 12:36:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:36:12,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:12,932 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:36:12,932 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:12,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-04 12:36:12,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:12,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:12,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:13,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:13,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:13,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:13,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:13,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:13,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:36:13,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:36:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:36:13,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:13,324 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-04 12:36:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:13,817 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 12:36:13,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:36:13,818 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-04 12:36:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:13,818 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:36:13,819 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:36:13,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:36:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-04 12:36:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:36:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 12:36:13,825 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-04 12:36:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:13,825 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 12:36:13,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:36:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 12:36:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:36:13,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:13,826 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 12:36:13,826 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:13,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-04 12:36:13,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:13,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:13,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:13,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:13,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:14,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:14,606 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 [2018-10-04 12:36:14,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:14,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:14,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:14,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:14,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:14,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:36:14,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:36:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:36:14,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:14,698 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-04 12:36:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:14,827 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-04 12:36:14,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:36:14,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:36:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:14,828 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:36:14,828 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:36:14,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:36:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:36:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:36:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 12:36:14,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-04 12:36:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:14,833 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 12:36:14,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:36:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 12:36:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:36:14,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:14,833 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 12:36:14,833 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:14,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:14,834 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-04 12:36:14,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:14,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:14,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:14,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:14,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:15,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:15,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:15,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:15,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:36:15,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:15,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:15,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:15,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:36:15,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:36:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:36:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:15,136 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-04 12:36:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:15,196 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 12:36:15,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:36:15,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:36:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:15,197 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:36:15,197 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:36:15,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:36:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:36:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:36:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-04 12:36:15,202 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-04 12:36:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:15,202 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-04 12:36:15,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:36:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-04 12:36:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:36:15,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:15,203 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:36:15,203 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:15,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-04 12:36:15,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:15,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:15,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:15,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:15,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:15,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:15,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:15,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:15,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:15,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:15,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:15,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:15,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:36:15,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:36:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:36:15,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:15,741 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-04 12:36:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:16,330 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-04 12:36:16,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:36:16,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-04 12:36:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:16,331 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:36:16,331 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:36:16,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:36:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-04 12:36:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:36:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-04 12:36:16,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-04 12:36:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:16,334 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-04 12:36:16,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:36:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-04 12:36:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:36:16,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:16,334 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 12:36:16,334 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:16,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-04 12:36:16,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:16,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:16,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:16,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:16,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:17,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:17,031 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 [2018-10-04 12:36:17,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:17,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-04 12:36:17,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:17,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:17,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:17,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:36:17,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:36:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:36:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:17,114 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-04 12:36:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:17,242 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-04 12:36:17,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:36:17,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:36:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:17,243 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:36:17,243 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:36:17,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:36:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:36:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:36:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 12:36:17,247 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-04 12:36:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:17,247 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 12:36:17,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:36:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 12:36:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:36:17,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:17,248 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 12:36:17,248 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:17,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-04 12:36:17,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:17,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:17,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:17,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:17,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:18,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:18,022 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 [2018-10-04 12:36:18,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:18,058 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 12:36:18,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:18,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:18,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:18,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:36:18,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:36:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:36:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:18,090 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 12:36:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:18,148 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-04 12:36:18,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:36:18,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:36:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:18,149 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:36:18,149 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:36:18,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:36:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:36:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:36:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-04 12:36:18,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-04 12:36:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:18,154 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-04 12:36:18,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:36:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-04 12:36:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:36:18,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:18,154 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:36:18,155 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:18,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-04 12:36:18,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:18,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:18,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:18,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:18,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:18,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:18,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:18,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:18,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:18,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:18,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:36:18,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:36:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:36:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:18,645 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-04 12:36:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:19,163 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 12:36:19,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:36:19,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-04 12:36:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:19,165 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:36:19,165 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:36:19,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:36:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-04 12:36:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:36:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 12:36:19,169 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-04 12:36:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:19,170 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 12:36:19,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:36:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 12:36:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:36:19,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:19,170 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 12:36:19,171 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:19,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-04 12:36:19,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:19,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:19,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:19,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:19,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:20,009 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 [2018-10-04 12:36:20,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:20,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:20,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:20,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:20,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:36:20,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:36:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:36:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:20,074 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-04 12:36:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:20,219 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-04 12:36:20,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:36:20,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:36:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:20,220 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:36:20,220 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:36:20,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:36:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:36:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:36:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 12:36:20,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-04 12:36:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:20,224 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 12:36:20,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:36:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 12:36:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:36:20,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:20,225 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 12:36:20,225 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:20,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-04 12:36:20,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:20,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:20,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:20,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:20,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:20,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:20,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:20,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:36:20,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:20,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:20,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:36:20,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:36:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:36:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:20,515 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-04 12:36:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:20,581 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 12:36:20,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:36:20,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:36:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:20,583 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:36:20,583 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:36:20,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:36:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:36:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:36:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-04 12:36:20,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-04 12:36:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:20,588 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-04 12:36:20,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:36:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-04 12:36:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:36:20,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:20,588 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:36:20,588 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:20,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-04 12:36:20,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:20,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:20,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:20,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:20,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:21,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:21,151 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 [2018-10-04 12:36:21,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:21,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:21,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:21,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:21,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:21,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:36:21,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:36:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:36:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:21,267 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-04 12:36:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:21,962 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-04 12:36:21,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:36:21,962 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-04 12:36:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:21,963 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:36:21,964 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:36:21,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:36:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-04 12:36:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:36:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-04 12:36:21,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-04 12:36:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:21,968 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-04 12:36:21,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:36:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-04 12:36:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:36:21,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:21,969 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 12:36:21,969 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:21,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-04 12:36:21,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:21,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:21,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:21,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:22,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:22,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:22,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:22,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:36:22,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:22,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:22,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:22,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:36:22,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:36:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:36:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:22,311 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-04 12:36:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:22,432 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-04 12:36:22,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:36:22,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:36:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:22,433 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:36:22,434 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:36:22,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:36:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:36:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:36:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 12:36:22,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-04 12:36:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:22,438 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 12:36:22,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:36:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 12:36:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:36:22,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:22,439 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 12:36:22,439 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:22,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-04 12:36:22,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:22,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:22,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:22,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:22,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:22,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:22,800 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 [2018-10-04 12:36:22,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:22,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 12:36:22,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:22,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:23,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:23,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:36:23,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:36:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:36:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:23,039 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 12:36:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:23,177 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-04 12:36:23,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:36:23,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:36:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:23,178 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:36:23,178 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:36:23,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:36:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:36:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:36:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-04 12:36:23,182 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-04 12:36:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:23,182 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-04 12:36:23,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:36:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-04 12:36:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:36:23,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:23,183 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:36:23,183 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:23,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-04 12:36:23,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:23,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:23,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:23,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:23,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:23,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:23,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:23,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:23,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:23,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:23,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:36:23,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:36:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:36:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:23,657 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-04 12:36:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:24,270 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 12:36:24,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:36:24,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-04 12:36:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:24,271 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:36:24,271 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:36:24,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:36:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-04 12:36:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:36:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 12:36:24,276 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 12:36:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:24,276 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 12:36:24,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:36:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 12:36:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:36:24,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:24,277 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 12:36:24,277 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:24,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:24,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-04 12:36:24,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:24,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:24,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:24,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:24,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:24,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:24,795 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 [2018-10-04 12:36:24,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:24,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:24,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:24,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:24,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:24,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:36:24,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:36:24,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:36:24,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:24,874 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-04 12:36:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:25,001 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-04 12:36:25,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:36:25,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:36:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:25,002 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:36:25,002 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:36:25,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:36:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:36:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:36:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 12:36:25,007 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-04 12:36:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:25,007 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 12:36:25,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:36:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 12:36:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:36:25,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:25,008 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 12:36:25,008 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:25,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-04 12:36:25,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:25,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:25,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:25,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:25,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:25,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:25,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:36:25,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:25,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:25,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:25,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:36:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:36:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:36:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:25,708 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-04 12:36:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:25,783 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 12:36:25,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:36:25,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:36:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:25,784 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:36:25,784 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:36:25,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:36:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:36:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:36:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-04 12:36:25,789 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-04 12:36:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:25,789 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-04 12:36:25,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:36:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-04 12:36:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:36:25,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:25,790 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:36:25,790 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:25,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-04 12:36:25,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:25,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:25,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:26,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:26,716 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 [2018-10-04 12:36:26,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:26,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:26,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:26,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:26,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:26,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:36:26,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:36:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:36:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:26,791 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-04 12:36:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:27,472 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-04 12:36:27,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:36:27,473 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-04 12:36:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:27,474 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:36:27,474 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:36:27,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:36:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-04 12:36:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:36:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 12:36:27,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-04 12:36:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:27,479 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 12:36:27,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:36:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 12:36:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:36:27,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:27,480 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 12:36:27,480 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:27,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-04 12:36:27,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:27,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:27,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:27,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:27,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:27,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:27,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:27,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:27,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:36:27,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:27,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:27,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:27,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:36:27,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:36:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:36:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:27,903 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 12:36:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:28,059 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-04 12:36:28,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:36:28,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:36:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:28,060 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:36:28,060 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:36:28,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:36:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:36:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:36:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 12:36:28,063 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-04 12:36:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:28,064 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 12:36:28,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:36:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 12:36:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:36:28,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:28,064 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 12:36:28,064 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:28,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-04 12:36:28,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:28,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:28,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:28,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:28,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:28,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:28,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:28,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:36:28,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:28,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:28,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:28,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:36:28,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:36:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:36:28,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:28,387 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 12:36:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:28,575 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-04 12:36:28,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:36:28,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:36:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:28,576 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:36:28,576 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:36:28,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:36:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:36:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:36:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-04 12:36:28,580 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-04 12:36:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:28,580 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-04 12:36:28,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:36:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-04 12:36:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:36:28,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:28,580 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:36:28,581 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:28,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-04 12:36:28,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:28,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:28,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:28,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:29,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:29,178 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 [2018-10-04 12:36:29,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:29,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:29,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:29,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:36:29,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:36:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:36:29,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:29,253 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-04 12:36:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:29,981 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 12:36:29,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:36:29,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 12:36:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:29,982 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:36:29,982 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:36:29,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:36:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-04 12:36:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:36:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-04 12:36:29,987 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-04 12:36:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:29,987 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-04 12:36:29,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:36:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-04 12:36:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:36:29,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:29,987 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 12:36:29,988 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:29,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:29,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-04 12:36:29,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:29,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:29,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:29,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:29,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:30,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:30,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:30,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:30,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:30,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:30,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:30,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:30,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:36:30,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:36:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:36:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:30,435 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-04 12:36:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:30,682 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-04 12:36:30,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:36:30,683 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:36:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:30,683 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:36:30,684 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:36:30,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:36:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:36:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:36:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 12:36:30,687 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-04 12:36:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:30,688 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 12:36:30,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:36:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 12:36:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:36:30,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:30,688 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 12:36:30,688 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:30,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-04 12:36:30,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:30,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:30,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:30,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:30,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:31,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:31,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:31,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:31,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-04 12:36:31,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:31,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:31,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:31,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:36:31,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:36:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:36:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:31,266 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-04 12:36:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:31,360 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 12:36:31,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:36:31,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:36:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:31,363 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:36:31,363 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:36:31,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:36:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:36:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:36:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-04 12:36:31,366 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-04 12:36:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:31,366 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-04 12:36:31,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:36:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-04 12:36:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:36:31,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:31,366 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:36:31,367 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:31,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-04 12:36:31,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:31,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:31,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:31,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:31,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:31,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:31,844 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:31,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:31,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:31,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:31,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:36:31,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:36:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:36:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:31,930 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-04 12:36:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:32,904 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-04 12:36:32,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:36:32,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-04 12:36:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:32,905 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:36:32,905 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:36:32,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:36:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-04 12:36:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:36:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:36:32,910 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 12:36:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:32,910 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:36:32,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:36:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:36:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:36:32,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:32,911 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 12:36:32,911 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:32,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-04 12:36:32,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:32,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:32,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:32,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:32,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:33,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:33,384 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 [2018-10-04 12:36:33,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:33,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 12:36:33,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:33,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:33,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:33,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:36:33,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:36:33,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:36:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:33,470 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-04 12:36:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:33,693 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-04 12:36:33,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:36:33,693 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:36:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:33,694 INFO L225 Difference]: With dead ends: 84 [2018-10-04 12:36:33,695 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:36:33,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:36:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:36:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:36:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 12:36:33,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-04 12:36:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:33,701 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 12:36:33,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:36:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 12:36:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:36:33,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:33,702 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 12:36:33,702 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:33,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-04 12:36:33,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:33,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:33,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:33,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:33,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:35,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:35,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:35,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:35,120 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 12:36:35,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:35,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:35,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:35,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:36:35,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:36:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:36:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:35,152 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 12:36:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:35,255 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-04 12:36:35,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:36:35,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:36:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:35,257 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:36:35,257 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:36:35,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:36:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:36:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:36:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-04 12:36:35,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-04 12:36:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:35,262 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-04 12:36:35,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:36:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-04 12:36:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:36:35,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:35,262 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:36:35,262 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:35,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-04 12:36:35,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:35,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:35,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:36,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:36,631 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 [2018-10-04 12:36:36,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:36,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:36,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:36,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:36:36,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:36:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:36:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:36,716 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-04 12:36:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:37,738 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 12:36:37,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:36:37,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-04 12:36:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:37,739 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:36:37,740 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:36:37,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:36:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-04 12:36:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:36:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 12:36:37,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-04 12:36:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:37,745 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 12:36:37,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:36:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 12:36:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:36:37,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:37,745 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 12:36:37,746 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:37,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-04 12:36:37,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:37,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:37,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:37,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:37,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:38,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:38,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:38,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:38,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:38,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:38,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:38,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:38,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:36:38,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:36:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:36:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:38,114 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-04 12:36:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:38,361 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-04 12:36:38,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:36:38,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:36:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:38,363 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:36:38,363 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:36:38,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:36:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:36:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:36:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 12:36:38,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-04 12:36:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:38,368 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 12:36:38,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:36:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 12:36:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:36:38,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:38,369 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 12:36:38,369 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:38,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-04 12:36:38,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:38,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:38,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:38,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:38,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:38,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:38,732 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 [2018-10-04 12:36:38,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:38,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-04 12:36:38,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:38,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:38,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:38,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:36:38,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:36:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:36:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:38,815 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-04 12:36:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:38,917 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 12:36:38,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:36:38,917 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:36:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:38,918 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:36:38,918 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:36:38,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:36:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:36:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:36:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-04 12:36:38,922 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-04 12:36:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:38,923 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-04 12:36:38,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:36:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-04 12:36:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:36:38,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:38,923 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:36:38,923 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:38,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-04 12:36:38,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:38,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:38,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:38,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:38,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:39,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:39,414 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 [2018-10-04 12:36:39,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:39,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:39,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:39,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:39,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:39,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:36:39,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:36:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:36:39,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:39,565 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-04 12:36:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:41,151 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-04 12:36:41,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:36:41,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-04 12:36:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:41,152 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:36:41,152 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:36:41,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:36:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:36:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-04 12:36:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:36:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 12:36:41,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-04 12:36:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:41,157 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 12:36:41,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:36:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 12:36:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:36:41,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:41,158 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 12:36:41,158 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:41,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-04 12:36:41,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:41,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:41,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:41,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:41,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:41,500 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 [2018-10-04 12:36:41,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:41,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-04 12:36:41,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:41,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:41,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:41,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:36:41,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:36:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:36:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:41,596 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-04 12:36:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:41,975 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-04 12:36:41,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:36:41,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:36:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:41,976 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:36:41,976 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:36:41,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:36:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:36:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:36:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 12:36:41,980 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-04 12:36:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:41,981 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 12:36:41,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:36:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 12:36:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:36:41,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:41,981 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 12:36:41,982 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:41,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-04 12:36:41,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:41,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:42,313 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 [2018-10-04 12:36:42,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:42,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-04 12:36:42,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:42,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:42,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:36:42,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:36:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:36:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:42,394 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 12:36:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:42,478 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-04 12:36:42,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:36:42,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:36:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:42,479 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:36:42,479 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:36:42,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:36:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:36:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:36:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-04 12:36:42,485 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-04 12:36:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:42,485 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-04 12:36:42,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:36:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-04 12:36:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:36:42,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:42,486 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-04 12:36:42,486 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:42,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-04 12:36:42,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:42,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:42,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:42,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:42,982 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 [2018-10-04 12:36:42,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:43,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:43,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:43,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:36:43,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:36:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:36:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:43,056 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-04 12:36:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:44,158 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 12:36:44,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:36:44,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-04 12:36:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:44,159 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:36:44,159 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:36:44,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:36:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:36:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-04 12:36:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:36:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-04 12:36:44,164 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-04 12:36:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:44,164 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-04 12:36:44,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:36:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-04 12:36:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:36:44,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:44,165 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 12:36:44,165 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:44,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-04 12:36:44,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:44,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:44,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:44,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:44,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:44,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:44,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:44,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:44,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:44,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:44,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:44,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:36:44,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:36:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:36:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:44,558 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-04 12:36:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:44,827 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-04 12:36:44,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:36:44,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:36:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:44,828 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:36:44,829 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:36:44,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:36:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:36:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:36:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 12:36:44,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-04 12:36:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:44,834 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 12:36:44,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:36:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 12:36:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:36:44,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:44,835 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 12:36:44,835 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:44,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-04 12:36:44,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:44,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:44,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:44,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:45,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:45,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:45,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:45,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:36:45,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:45,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:45,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:45,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:36:45,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:36:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:36:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:45,650 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-04 12:36:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:45,798 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 12:36:45,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:36:45,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:36:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:45,799 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:36:45,800 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:36:45,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:36:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:36:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:36:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-04 12:36:45,806 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-04 12:36:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:45,806 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-04 12:36:45,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:36:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-04 12:36:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:36:45,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:45,807 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-04 12:36:45,807 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:45,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-04 12:36:45,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:45,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:45,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:45,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:46,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:46,656 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 [2018-10-04 12:36:46,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:46,714 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:46,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:46,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:46,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:46,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:36:46,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:36:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:36:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:46,802 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-04 12:36:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:47,978 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-04 12:36:47,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:36:47,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-04 12:36:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:47,979 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:36:47,979 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:36:47,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:36:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:36:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-04 12:36:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:36:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 12:36:47,985 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-04 12:36:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 12:36:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:36:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 12:36:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:36:47,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:47,986 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 12:36:47,987 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:47,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-04 12:36:47,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:47,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:47,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:47,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:47,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:48,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:48,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:48,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:48,566 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:36:48,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:48,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:48,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:48,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:36:48,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:36:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:36:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:48,615 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-04 12:36:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:48,887 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-04 12:36:48,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:36:48,888 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:36:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:48,889 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:36:48,889 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:36:48,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:36:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:36:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:36:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 12:36:48,895 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-04 12:36:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:48,895 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 12:36:48,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:36:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 12:36:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:36:48,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:48,896 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 12:36:48,896 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:48,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-04 12:36:48,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:48,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:48,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:48,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:48,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:50,010 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 [2018-10-04 12:36:50,017 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:50,056 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:36:50,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:50,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:50,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:36:50,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:36:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:36:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:50,091 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 12:36:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:50,191 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-04 12:36:50,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:36:50,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:36:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:50,193 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:36:50,193 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:36:50,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:36:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:36:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:36:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-04 12:36:50,197 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-04 12:36:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:50,198 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-04 12:36:50,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:36:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-04 12:36:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:36:50,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:50,199 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-04 12:36:50,199 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:50,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-04 12:36:50,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:50,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:50,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:50,824 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 [2018-10-04 12:36:50,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:50,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:50,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:36:50,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:36:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:36:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:50,926 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-04 12:36:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:52,230 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 12:36:52,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:36:52,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-04 12:36:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:52,231 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:36:52,231 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:36:52,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:36:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:36:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-04 12:36:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:36:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 12:36:52,235 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-04 12:36:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:52,236 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 12:36:52,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:36:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 12:36:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:36:52,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:52,236 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 12:36:52,236 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:52,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-04 12:36:52,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:52,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:52,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:52,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:52,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:52,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:52,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:52,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:52,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:52,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:52,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:52,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:36:52,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:36:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:36:52,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:52,971 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-04 12:36:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:53,312 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-04 12:36:53,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:36:53,312 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:36:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:53,313 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:36:53,313 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:36:53,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:36:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:36:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:36:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 12:36:53,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-04 12:36:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:53,318 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 12:36:53,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:36:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 12:36:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:36:53,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:53,319 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 12:36:53,319 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:53,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-04 12:36:53,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:53,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:53,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:53,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:53,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:53,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:53,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:36:53,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:53,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:53,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:53,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:36:53,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:36:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:36:53,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:53,899 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-04 12:36:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:53,990 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 12:36:53,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:36:53,990 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:36:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:53,991 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:36:53,991 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:36:53,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:36:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:36:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:36:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-04 12:36:53,996 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-04 12:36:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:53,996 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-04 12:36:53,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:36:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-04 12:36:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:36:53,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:53,997 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-04 12:36:53,997 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:53,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-04 12:36:53,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:53,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:53,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:53,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:53,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:54,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:54,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:54,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:54,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:54,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:54,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:54,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:54,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:36:54,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:36:54,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:36:54,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:54,715 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-04 12:36:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:56,140 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-04 12:36:56,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:36:56,141 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-04 12:36:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:56,142 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:36:56,142 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:36:56,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:36:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:36:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-04 12:36:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:36:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 12:36:56,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 12:36:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:56,149 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 12:36:56,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:36:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 12:36:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:36:56,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:56,149 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 12:36:56,150 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:56,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-04 12:36:56,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:56,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:56,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:56,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:56,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:56,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:56,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:36:56,582 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:56,635 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-04 12:36:56,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:56,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:56,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:56,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:36:56,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:36:56,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:36:56,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:36:56,706 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-04 12:36:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:57,224 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-04 12:36:57,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:36:57,225 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:36:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:57,225 INFO L225 Difference]: With dead ends: 102 [2018-10-04 12:36:57,225 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:36:57,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:36:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:36:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:36:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:36:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 12:36:57,229 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-04 12:36:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:57,229 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 12:36:57,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:36:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 12:36:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:36:57,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:57,230 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 12:36:57,230 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:57,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-04 12:36:57,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:57,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:57,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:57,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:57,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:57,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:57,813 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 [2018-10-04 12:36:57,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:57,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 12:36:57,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:57,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:57,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:57,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:36:57,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:36:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:36:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:36:57,927 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 12:36:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:58,102 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-04 12:36:58,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:36:58,103 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:36:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:58,103 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:36:58,103 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:36:58,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:36:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:36:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:36:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:36:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-04 12:36:58,109 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-04 12:36:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:58,109 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-04 12:36:58,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:36:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-04 12:36:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:36:58,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:58,110 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-04 12:36:58,110 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:58,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-04 12:36:58,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:58,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:58,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:58,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:58,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:58,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:58,778 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 [2018-10-04 12:36:58,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:58,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:58,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:58,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:36:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:36:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:36:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:36:58,936 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-04 12:37:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:00,668 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 12:37:00,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:37:00,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-04 12:37:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:00,669 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:37:00,669 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:37:00,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:37:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:37:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-04 12:37:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:37:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 12:37:00,675 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-04 12:37:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:00,675 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 12:37:00,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:37:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 12:37:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:37:00,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:00,675 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 12:37:00,676 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:00,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:00,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-04 12:37:00,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:00,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:00,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:00,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:00,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:01,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:01,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:01,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:01,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:01,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:01,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:01,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:01,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:37:01,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:37:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:37:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:01,229 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-04 12:37:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:02,734 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-04 12:37:02,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:37:02,734 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:37:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:02,735 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:37:02,735 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:37:02,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:37:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:37:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:37:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 12:37:02,741 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-04 12:37:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:02,741 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 12:37:02,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:37:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 12:37:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:37:02,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:02,742 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 12:37:02,742 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:02,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-04 12:37:02,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:02,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:02,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:02,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:02,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:03,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:03,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:03,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:03,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 12:37:03,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:03,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:03,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:03,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:37:03,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:37:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:37:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:03,563 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-04 12:37:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:03,753 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 12:37:03,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:37:03,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:37:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:03,755 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:37:03,755 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:37:03,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:37:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:37:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:37:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-04 12:37:03,761 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-04 12:37:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:03,761 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-04 12:37:03,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:37:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-04 12:37:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:37:03,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:03,762 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-04 12:37:03,762 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:03,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-04 12:37:03,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:03,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:03,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:03,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:03,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:04,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:04,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:04,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:04,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:04,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:04,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:04,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:04,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:37:04,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:37:04,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:37:04,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:04,484 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-04 12:37:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:06,010 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-04 12:37:06,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:37:06,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-04 12:37:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:06,011 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:37:06,011 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:37:06,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:37:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-04 12:37:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:37:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-04 12:37:06,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-04 12:37:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:06,017 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-04 12:37:06,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:37:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-04 12:37:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:37:06,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:06,018 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 12:37:06,018 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:06,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-04 12:37:06,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:06,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:06,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:06,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:06,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:06,447 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 [2018-10-04 12:37:06,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:06,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:37:06,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:06,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:06,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:06,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:37:06,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:37:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:37:06,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:06,541 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-04 12:37:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:06,863 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-04 12:37:06,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:37:06,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:37:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:06,864 INFO L225 Difference]: With dead ends: 108 [2018-10-04 12:37:06,864 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:37:06,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:37:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:37:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:37:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 12:37:06,870 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-04 12:37:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:06,870 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 12:37:06,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:37:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 12:37:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:37:06,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:06,870 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 12:37:06,871 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:06,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-04 12:37:06,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:06,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:06,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:06,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:07,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:07,668 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 [2018-10-04 12:37:07,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:07,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-04 12:37:07,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:07,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:07,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:07,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:37:07,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:37:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:37:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:07,762 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 12:37:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:07,877 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-04 12:37:07,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:37:07,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:37:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:07,878 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:37:07,878 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:37:07,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:37:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:37:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:37:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-04 12:37:07,885 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-04 12:37:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:07,885 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-04 12:37:07,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:37:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-04 12:37:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:37:07,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:07,886 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-04 12:37:07,886 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:07,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-04 12:37:07,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:07,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:07,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:07,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:08,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:08,710 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 [2018-10-04 12:37:08,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:08,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:08,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:08,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:37:08,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:37:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:37:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:08,797 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-04 12:37:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:10,256 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 12:37:10,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:37:10,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-04 12:37:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:10,257 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:37:10,257 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:37:10,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:37:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-04 12:37:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:37:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-04 12:37:10,262 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-04 12:37:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:10,262 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-04 12:37:10,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:37:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-04 12:37:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:37:10,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:10,263 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 12:37:10,263 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:10,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-04 12:37:10,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:10,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:10,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:10,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:10,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:10,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:10,810 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 [2018-10-04 12:37:10,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:10,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:10,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:10,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:10,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:10,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:37:10,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:37:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:37:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:10,913 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-04 12:37:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:11,223 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-04 12:37:11,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:37:11,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 12:37:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:11,224 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:37:11,224 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:37:11,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:37:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:37:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:37:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 12:37:11,230 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-04 12:37:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:11,231 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 12:37:11,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:37:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 12:37:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:37:11,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:11,231 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 12:37:11,232 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:11,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-04 12:37:11,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:11,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:11,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:11,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:11,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:11,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:11,893 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 [2018-10-04 12:37:11,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:11,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:37:11,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:11,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:11,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:11,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:37:11,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:37:11,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:37:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:11,987 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-04 12:37:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:12,107 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 12:37:12,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:37:12,108 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 12:37:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:12,109 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:37:12,109 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:37:12,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:37:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:37:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:37:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-04 12:37:12,115 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-04 12:37:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:12,115 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-04 12:37:12,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:37:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-04 12:37:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:37:12,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:12,116 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-04 12:37:12,116 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:12,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-04 12:37:12,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:12,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:12,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:12,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:12,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:13,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:13,048 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 [2018-10-04 12:37:13,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:13,095 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:13,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:13,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:13,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:13,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:37:13,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:37:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:37:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:13,142 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-04 12:37:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:14,657 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-04 12:37:14,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:37:14,657 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-04 12:37:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:14,658 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:37:14,658 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:37:14,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:37:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-04 12:37:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:37:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 12:37:14,664 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-04 12:37:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:14,665 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 12:37:14,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:37:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 12:37:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:37:14,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:14,665 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 12:37:14,665 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:14,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:14,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-04 12:37:14,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:14,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:14,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:14,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:14,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:15,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:15,559 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 [2018-10-04 12:37:15,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:15,619 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:37:15,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:15,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:15,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:15,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:37:15,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:37:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:37:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:15,670 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-04 12:37:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:16,024 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-04 12:37:16,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:37:16,024 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:37:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:16,025 INFO L225 Difference]: With dead ends: 114 [2018-10-04 12:37:16,025 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:37:16,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:37:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:37:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:37:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 12:37:16,032 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-04 12:37:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:16,032 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 12:37:16,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:37:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 12:37:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:37:16,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:16,032 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 12:37:16,033 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:16,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-04 12:37:16,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:16,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:16,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:16,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:16,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:16,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:16,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:16,611 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:37:16,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:16,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:16,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:16,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:37:16,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:37:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:37:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:16,648 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 12:37:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:16,757 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-04 12:37:16,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:37:16,758 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:37:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:16,758 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:37:16,758 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:37:16,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:37:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:37:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:37:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-04 12:37:16,766 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-04 12:37:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:16,766 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-04 12:37:16,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:37:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-04 12:37:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:37:16,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:16,767 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-04 12:37:16,767 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:16,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-04 12:37:16,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:16,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:16,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:16,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:17,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:17,960 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 [2018-10-04 12:37:17,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:18,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:18,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:18,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:37:18,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:37:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:37:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:18,058 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-04 12:37:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:19,694 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 12:37:19,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:37:19,695 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-04 12:37:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:19,696 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:37:19,696 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:37:19,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:37:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-04 12:37:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:37:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-04 12:37:19,703 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-04 12:37:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:19,703 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-04 12:37:19,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:37:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-04 12:37:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:37:19,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:19,704 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 12:37:19,704 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:19,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-04 12:37:19,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:19,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:19,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:19,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:19,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:20,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:20,263 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 [2018-10-04 12:37:20,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:20,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:20,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:20,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:20,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:20,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:37:20,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:37:20,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:37:20,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:20,380 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-04 12:37:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:20,770 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-04 12:37:20,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:37:20,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 12:37:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:20,771 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:37:20,772 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:37:20,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:37:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:37:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:37:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 12:37:20,776 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-04 12:37:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:20,777 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 12:37:20,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:37:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 12:37:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:37:20,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:20,777 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 12:37:20,777 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:20,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:20,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-04 12:37:20,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:20,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:20,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:20,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:20,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:21,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:21,334 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 [2018-10-04 12:37:21,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:21,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-04 12:37:21,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:21,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:21,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:21,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:37:21,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:37:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:37:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:21,445 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-04 12:37:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:21,561 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 12:37:21,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:37:21,561 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 12:37:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:21,562 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:37:21,562 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:37:21,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:37:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:37:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:37:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-04 12:37:21,569 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-04 12:37:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:21,569 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-04 12:37:21,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:37:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-04 12:37:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:37:21,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:21,570 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-04 12:37:21,570 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:21,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-04 12:37:21,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:21,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:21,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:21,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:21,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:22,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:22,320 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 [2018-10-04 12:37:22,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:22,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:22,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:22,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:22,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:22,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:37:22,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:37:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:37:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:22,415 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-04 12:37:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:24,166 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-04 12:37:24,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:37:24,167 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-04 12:37:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:24,167 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:37:24,168 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 12:37:24,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 12:37:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-04 12:37:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:37:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 12:37:24,174 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-04 12:37:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:24,174 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 12:37:24,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:37:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 12:37:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:37:24,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:24,174 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 12:37:24,175 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:24,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-04 12:37:24,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:24,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:24,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:24,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:24,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:24,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:24,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:24,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:24,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-04 12:37:24,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:24,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:24,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:24,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:37:24,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:37:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:37:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:24,834 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-04 12:37:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:25,346 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-04 12:37:25,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:37:25,347 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:37:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:25,347 INFO L225 Difference]: With dead ends: 120 [2018-10-04 12:37:25,347 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:37:25,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:37:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:37:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:37:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 12:37:25,354 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-04 12:37:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:25,354 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 12:37:25,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:37:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 12:37:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:37:25,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:25,355 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 12:37:25,355 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:25,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-04 12:37:25,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:25,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:25,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:25,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:25,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:26,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:26,164 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 [2018-10-04 12:37:26,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:26,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:37:26,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:26,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:26,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:26,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:37:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:37:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:37:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:26,265 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 12:37:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:26,380 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-04 12:37:26,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:37:26,381 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:37:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:26,381 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:37:26,382 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:37:26,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:37:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:37:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:37:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-04 12:37:26,391 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-04 12:37:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:26,392 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-04 12:37:26,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:37:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-04 12:37:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:37:26,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:26,392 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-04 12:37:26,393 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:26,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-04 12:37:26,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:26,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:26,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:26,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:26,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:27,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:27,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:27,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:27,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:27,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:27,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:37:27,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:37:27,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:37:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:27,282 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-04 12:37:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:29,116 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 12:37:29,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:37:29,117 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-04 12:37:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:29,117 INFO L225 Difference]: With dead ends: 122 [2018-10-04 12:37:29,117 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:37:29,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:37:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-04 12:37:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:37:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 12:37:29,125 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-04 12:37:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:29,125 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 12:37:29,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:37:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 12:37:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:37:29,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:29,126 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 12:37:29,127 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:29,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-04 12:37:29,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:29,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:29,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:29,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:29,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:29,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:29,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:29,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:29,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:29,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:29,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:29,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:29,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:37:29,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:37:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:37:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:29,916 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-04 12:37:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:30,324 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-04 12:37:30,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:37:30,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 12:37:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:30,325 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:37:30,326 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:37:30,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:37:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:37:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:37:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 12:37:30,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-04 12:37:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:30,331 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 12:37:30,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:37:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 12:37:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:37:30,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:30,332 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 12:37:30,332 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:30,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-04 12:37:30,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:30,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:30,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:30,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:30,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:30,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:30,974 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 [2018-10-04 12:37:30,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:31,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-04 12:37:31,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:31,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:31,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:31,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:37:31,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:37:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:37:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:31,075 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-04 12:37:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:31,191 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 12:37:31,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:37:31,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 12:37:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:31,192 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:37:31,192 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:37:31,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:37:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:37:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:37:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-04 12:37:31,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-04 12:37:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:31,198 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-04 12:37:31,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:37:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-04 12:37:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 12:37:31,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:31,198 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-04 12:37:31,199 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:31,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-04 12:37:31,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:31,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:31,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:31,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:31,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:32,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:32,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:32,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:32,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:32,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:32,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:32,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:32,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:37:32,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:37:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:37:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:32,128 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-04 12:37:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:34,045 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-04 12:37:34,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:37:34,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-04 12:37:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:34,046 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:37:34,046 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 12:37:34,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 12:37:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-04 12:37:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:37:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 12:37:34,052 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-04 12:37:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:34,052 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 12:37:34,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:37:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 12:37:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:37:34,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:34,053 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 12:37:34,053 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:34,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-04 12:37:34,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:34,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:34,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:34,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:34,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:34,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:34,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:34,657 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:34,720 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-04 12:37:34,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:34,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:34,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:34,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:37:34,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:37:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:37:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:34,757 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-04 12:37:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:35,238 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-04 12:37:35,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:37:35,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:37:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:35,239 INFO L225 Difference]: With dead ends: 126 [2018-10-04 12:37:35,239 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:37:35,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:37:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:37:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:37:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 12:37:35,245 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-04 12:37:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:35,245 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 12:37:35,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:37:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 12:37:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:37:35,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:35,246 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 12:37:35,246 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:35,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-04 12:37:35,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:35,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:35,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:35,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:35,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:35,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:35,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:37:35,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:35,951 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 12:37:35,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:35,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:35,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:35,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:37:35,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:37:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:37:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:35,988 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 12:37:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:36,099 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-04 12:37:36,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:37:36,100 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:37:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:36,100 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:37:36,100 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:37:36,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:37:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 12:37:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:37:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-04 12:37:36,106 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-04 12:37:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:36,106 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-04 12:37:36,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:37:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-04 12:37:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:37:36,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:36,107 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-04 12:37:36,107 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:36,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-04 12:37:36,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:36,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:36,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:36,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:36,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:36,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:36,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:36,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:37,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:37,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:37,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:37:37,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:37:37,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:37:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:37,052 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-04 12:37:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:38,960 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 12:37:38,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:37:38,960 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-04 12:37:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:38,961 INFO L225 Difference]: With dead ends: 128 [2018-10-04 12:37:38,961 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:37:38,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:37:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-04 12:37:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:37:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 12:37:38,967 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 12:37:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:38,968 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 12:37:38,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:37:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 12:37:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:37:38,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:38,968 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 12:37:38,969 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:38,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-04 12:37:38,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:38,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:38,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:38,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:38,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:39,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:39,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:39,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:39,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:39,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:39,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:39,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:39,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:37:39,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:37:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:37:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:39,702 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-04 12:37:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:40,015 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-04 12:37:40,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:37:40,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 12:37:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:40,016 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:37:40,016 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:37:40,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:37:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:37:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:37:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 12:37:40,022 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-04 12:37:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 12:37:40,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:37:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 12:37:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:37:40,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:40,023 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 12:37:40,024 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:40,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-04 12:37:40,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:40,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:40,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:40,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:40,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:40,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:40,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:37:40,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:40,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:40,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:40,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:37:40,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:37:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:37:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:40,812 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-04 12:37:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:40,945 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 12:37:40,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:37:40,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 12:37:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:40,947 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:37:40,947 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:37:40,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:37:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:37:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:37:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-04 12:37:40,953 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-04 12:37:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:40,953 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-04 12:37:40,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:37:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-04 12:37:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 12:37:40,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:40,954 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-04 12:37:40,954 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:40,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-04 12:37:40,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:40,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:40,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:41,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:41,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:41,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:41,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:41,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:41,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:41,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:41,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:37:41,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:37:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:37:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:41,962 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-04 12:37:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:43,962 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-04 12:37:43,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:37:43,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-04 12:37:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:43,963 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:37:43,963 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 12:37:43,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 12:37:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-04 12:37:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:37:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 12:37:43,969 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-04 12:37:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:43,969 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 12:37:43,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:37:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 12:37:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:37:43,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:43,970 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 12:37:43,970 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:43,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-04 12:37:43,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:43,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:43,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:44,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:44,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:44,658 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:44,722 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:37:44,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:44,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:44,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:44,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:37:44,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:37:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:37:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:44,763 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-04 12:37:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:45,177 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-04 12:37:45,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:37:45,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:37:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:45,178 INFO L225 Difference]: With dead ends: 132 [2018-10-04 12:37:45,178 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:37:45,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:37:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:37:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:37:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 12:37:45,183 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-04 12:37:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:45,183 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 12:37:45,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:37:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 12:37:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:37:45,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:45,184 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 12:37:45,184 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:45,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-04 12:37:45,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:45,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:45,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:45,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:45,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:45,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:45,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:45,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:45,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:37:45,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:45,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:45,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:45,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:37:45,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:37:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:37:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:45,994 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 12:37:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:46,112 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-04 12:37:46,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:37:46,112 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:37:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:46,113 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:37:46,113 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:37:46,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:37:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:37:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:37:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-04 12:37:46,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-04 12:37:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:46,121 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-04 12:37:46,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:37:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-04 12:37:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:37:46,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:46,121 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-04 12:37:46,121 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:46,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-04 12:37:46,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:46,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:46,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:46,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:46,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:47,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:47,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:47,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:47,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:47,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:47,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:37:47,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:37:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:37:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:47,255 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-04 12:37:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:49,396 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 12:37:49,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:37:49,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-04 12:37:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:49,397 INFO L225 Difference]: With dead ends: 134 [2018-10-04 12:37:49,397 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:37:49,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:37:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-04 12:37:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:37:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 12:37:49,403 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-04 12:37:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:49,403 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 12:37:49,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:37:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 12:37:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:37:49,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:49,404 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 12:37:49,404 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:49,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-04 12:37:49,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:49,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:49,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:49,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:49,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:50,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:50,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:50,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:50,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:50,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:50,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:50,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:50,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:37:50,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:37:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:37:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:50,208 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-04 12:37:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:50,801 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-04 12:37:50,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:37:50,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 12:37:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:50,802 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:37:50,802 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:37:50,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:37:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:37:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:37:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 12:37:50,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-04 12:37:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:50,808 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 12:37:50,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:37:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 12:37:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:37:50,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:50,809 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 12:37:50,809 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:50,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-04 12:37:50,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:50,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:50,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:50,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:50,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:51,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:51,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:51,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:51,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:37:51,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:51,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:51,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:51,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:37:51,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:37:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:37:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:51,672 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-04 12:37:51,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:51,830 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 12:37:51,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:37:51,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 12:37:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:51,831 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:37:51,831 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 12:37:51,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 12:37:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 12:37:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:37:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-04 12:37:51,837 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-04 12:37:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:51,837 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-04 12:37:51,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:37:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-04 12:37:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:37:51,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:51,837 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-04 12:37:51,838 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:51,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-04 12:37:51,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:51,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:51,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:51,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:51,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:52,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:52,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:52,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:52,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:52,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:52,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:52,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:52,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:37:52,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:37:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:37:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:52,915 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-04 12:37:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:55,108 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-04 12:37:55,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:37:55,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-04 12:37:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:55,110 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:37:55,110 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 12:37:55,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 12:37:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-04 12:37:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:37:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 12:37:55,116 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 12:37:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:55,116 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 12:37:55,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:37:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 12:37:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:37:55,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:55,117 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 12:37:55,117 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:55,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-04 12:37:55,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:55,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:55,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:55,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:55,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:55,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:55,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:55,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:56,026 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 12:37:56,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:56,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:56,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:56,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:37:56,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:37:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:37:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:56,071 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-04 12:37:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:56,637 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-04 12:37:56,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:37:56,637 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:37:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:56,638 INFO L225 Difference]: With dead ends: 138 [2018-10-04 12:37:56,639 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:37:56,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:37:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:37:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:37:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 12:37:56,645 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-04 12:37:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:56,645 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 12:37:56,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:37:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 12:37:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:37:56,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:56,645 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 12:37:56,646 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:56,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-04 12:37:56,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:56,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:56,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:57,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:57,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:57,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:57,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 12:37:57,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:57,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:57,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:57,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:37:57,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:37:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:37:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:57,508 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 12:37:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:57,636 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-04 12:37:57,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:37:57,637 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:37:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:57,637 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:37:57,637 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:37:57,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:37:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:37:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:37:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-04 12:37:57,644 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-04 12:37:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-04 12:37:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:37:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-04 12:37:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 12:37:57,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:57,644 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-04 12:37:57,644 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:57,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-04 12:37:57,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:57,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:57,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:58,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:58,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:58,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:58,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:58,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:58,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:37:58,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:37:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:37:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:58,776 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-04 12:38:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:01,092 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 12:38:01,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:38:01,092 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-04 12:38:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:01,093 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:38:01,093 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:38:01,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:38:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:38:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-04 12:38:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:38:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 12:38:01,099 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-04 12:38:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:01,099 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 12:38:01,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:38:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 12:38:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:38:01,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:01,100 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 12:38:01,100 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:01,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-04 12:38:01,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:01,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:01,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:01,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:01,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:01,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:01,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:01,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:01,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:01,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:01,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:01,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:01,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:38:01,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:38:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:38:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:01,931 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-04 12:38:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:02,522 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-04 12:38:02,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:38:02,522 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 12:38:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:02,523 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:38:02,523 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:38:02,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:38:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:38:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:38:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 12:38:02,529 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-04 12:38:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:02,529 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 12:38:02,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:38:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 12:38:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:38:02,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:02,529 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 12:38:02,530 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:02,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-04 12:38:02,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:02,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:02,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:03,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:03,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:03,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:03,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 12:38:03,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:03,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:03,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:38:03,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:38:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:38:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:03,418 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-04 12:38:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:03,548 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 12:38:03,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:38:03,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 12:38:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:03,549 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:38:03,549 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:38:03,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:38:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:38:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:38:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-04 12:38:03,557 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-04 12:38:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:03,557 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-04 12:38:03,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:38:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-04 12:38:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:38:03,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:03,558 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-04 12:38:03,558 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:03,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-04 12:38:03,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:03,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:03,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:03,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:03,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:04,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:04,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:04,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:04,772 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:04,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:04,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:04,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:04,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:38:04,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:38:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:38:04,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:04,818 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-04 12:38:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:07,227 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-04 12:38:07,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:38:07,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-04 12:38:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:07,228 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:38:07,229 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 12:38:07,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:38:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 12:38:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-04 12:38:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:38:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 12:38:07,235 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-04 12:38:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:07,235 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 12:38:07,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:38:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 12:38:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:38:07,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:07,235 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 12:38:07,236 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:07,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-04 12:38:07,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:07,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:07,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:07,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:07,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:08,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:08,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:08,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:38:08,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:38:08,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:08,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:08,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:08,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:38:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:38:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:38:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:08,126 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-04 12:38:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:08,512 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-04 12:38:08,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:38:08,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:38:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:08,513 INFO L225 Difference]: With dead ends: 144 [2018-10-04 12:38:08,513 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:38:08,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:38:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:38:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:38:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 12:38:08,519 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-04 12:38:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:08,519 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 12:38:08,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:38:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 12:38:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:38:08,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:08,520 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 12:38:08,520 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:08,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:08,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-04 12:38:08,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:08,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:08,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:08,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:08,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:09,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:09,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:09,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:38:09,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 12:38:09,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:09,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:09,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:09,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:38:09,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:38:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:38:09,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:09,476 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 12:38:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:09,605 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-04 12:38:09,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:38:09,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:38:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:09,606 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:38:09,606 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:38:09,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:38:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:38:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:38:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-04 12:38:09,612 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-04 12:38:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:09,612 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-04 12:38:09,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:38:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-04 12:38:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:38:09,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:09,613 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-04 12:38:09,613 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:09,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-04 12:38:09,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:09,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:09,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:09,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:09,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:10,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:10,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:10,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:10,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:10,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:10,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:38:10,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:38:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:38:10,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:10,797 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-04 12:38:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:13,298 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 12:38:13,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:38:13,299 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-04 12:38:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:13,300 INFO L225 Difference]: With dead ends: 146 [2018-10-04 12:38:13,300 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:38:13,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:38:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-04 12:38:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:38:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-04 12:38:13,306 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-04 12:38:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:13,306 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-04 12:38:13,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:38:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-04 12:38:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:38:13,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:13,307 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 12:38:13,307 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:13,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-04 12:38:13,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:13,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:13,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:13,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:13,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:14,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:14,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:14,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:14,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:14,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:14,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:14,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:14,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:38:14,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:38:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:38:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:14,204 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-04 12:38:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:14,845 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-04 12:38:14,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:38:14,846 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 12:38:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:14,846 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:38:14,846 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:38:14,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:38:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:38:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:38:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 12:38:14,852 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-04 12:38:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:14,852 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 12:38:14,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:38:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 12:38:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:38:14,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:14,853 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 12:38:14,853 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:14,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-04 12:38:14,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:14,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:14,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:15,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:15,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:15,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:15,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:38:15,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:15,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:15,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:15,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:38:15,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:38:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:38:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:15,809 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-04 12:38:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:15,962 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 12:38:15,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:38:15,963 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 12:38:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:15,963 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:38:15,963 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:38:15,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:38:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 12:38:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:38:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-04 12:38:15,970 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-04 12:38:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:15,970 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-04 12:38:15,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:38:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-04 12:38:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:38:15,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:15,971 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-04 12:38:15,971 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:15,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-04 12:38:15,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:15,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:15,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:17,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:17,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:17,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:17,186 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:17,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:17,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:17,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:17,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:38:17,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:38:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:38:17,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:17,233 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-04 12:38:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:19,845 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-04 12:38:19,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:38:19,846 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-04 12:38:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:19,847 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:38:19,847 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 12:38:19,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 12:38:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-04 12:38:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:38:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 12:38:19,854 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-04 12:38:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:19,854 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 12:38:19,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:38:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 12:38:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:38:19,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:19,855 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 12:38:19,855 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:19,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-04 12:38:19,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:19,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:19,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:19,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:19,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:20,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:20,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:20,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:38:20,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:38:20,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:20,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:20,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:20,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:38:20,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:38:20,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:38:20,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:20,806 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-04 12:38:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:21,487 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-04 12:38:21,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:38:21,488 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:38:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:21,488 INFO L225 Difference]: With dead ends: 150 [2018-10-04 12:38:21,489 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:38:21,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:38:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:38:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:38:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 12:38:21,495 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-04 12:38:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:21,495 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 12:38:21,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:38:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 12:38:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:38:21,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:21,496 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 12:38:21,496 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:21,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-04 12:38:21,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:21,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:21,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:21,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:21,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:22,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:22,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:22,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:38:22,449 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:38:22,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:22,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:22,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:22,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:38:22,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:38:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:38:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:22,491 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 12:38:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:22,664 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-04 12:38:22,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:38:22,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:38:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:22,665 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:38:22,665 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:38:22,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:38:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:38:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:38:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-04 12:38:22,672 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-04 12:38:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:22,672 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-04 12:38:22,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:38:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-04 12:38:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 12:38:22,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:22,672 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-04 12:38:22,672 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:22,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-04 12:38:22,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:22,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:22,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:23,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:23,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:23,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:23,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:23,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:23,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:38:23,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:38:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:38:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:23,949 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-04 12:38:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:26,676 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 12:38:26,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:38:26,676 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-04 12:38:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:26,677 INFO L225 Difference]: With dead ends: 152 [2018-10-04 12:38:26,677 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:38:26,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:38:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-04 12:38:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:38:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-04 12:38:26,684 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-04 12:38:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:26,684 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-04 12:38:26,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:38:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-04 12:38:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:38:26,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:26,684 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 12:38:26,685 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:26,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-04 12:38:26,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:26,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:26,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:27,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:27,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:27,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:27,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:27,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:27,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:27,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:27,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:38:27,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:38:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:38:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:27,636 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-04 12:38:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:28,330 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-04 12:38:28,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:38:28,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 12:38:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:28,331 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:38:28,331 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:38:28,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:38:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:38:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:38:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 12:38:28,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-04 12:38:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:28,339 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 12:38:28,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:38:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 12:38:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:38:28,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:28,340 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 12:38:28,340 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:28,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:28,340 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-04 12:38:28,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:28,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:28,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:28,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:28,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:29,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:29,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:29,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:29,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 12:38:29,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:29,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:29,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:29,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:38:29,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:38:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:38:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:29,394 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-04 12:38:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:29,564 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 12:38:29,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:38:29,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 12:38:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:29,565 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:38:29,565 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:38:29,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:38:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 12:38:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:38:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-04 12:38:29,572 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-04 12:38:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:29,572 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-04 12:38:29,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:38:29,572 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-04 12:38:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:38:29,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:29,572 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-04 12:38:29,573 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:29,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-04 12:38:29,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:29,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:29,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:29,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:29,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:30,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:30,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:30,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:30,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:30,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:30,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:31,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:31,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:38:31,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:38:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:38:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:31,033 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-04 12:38:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:33,872 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-04 12:38:33,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:38:33,873 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-04 12:38:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:33,873 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:38:33,873 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 12:38:33,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 12:38:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-04 12:38:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:38:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 12:38:33,881 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 12:38:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:33,881 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 12:38:33,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:38:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 12:38:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:38:33,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:33,882 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 12:38:33,882 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:33,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-04 12:38:33,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:33,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:33,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:33,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:33,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:34,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:34,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:34,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:38:34,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 12:38:34,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:34,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:34,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:34,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:38:34,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:38:34,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:38:34,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:34,923 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-04 12:38:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:35,647 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-04 12:38:35,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:38:35,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:38:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:35,648 INFO L225 Difference]: With dead ends: 156 [2018-10-04 12:38:35,648 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:38:35,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:38:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:38:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:38:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 12:38:35,655 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-04 12:38:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:35,656 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 12:38:35,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:38:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 12:38:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:38:35,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:35,656 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 12:38:35,656 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:35,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:35,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-04 12:38:35,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:35,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:35,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:35,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:35,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:36,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:36,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:36,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:38:36,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 12:38:36,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:36,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:36,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:36,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:38:36,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:38:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:38:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:36,739 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 12:38:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:36,884 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-04 12:38:36,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:38:36,885 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:38:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:36,885 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:38:36,885 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:38:36,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:38:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:38:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:38:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-04 12:38:36,893 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-04 12:38:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:36,893 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-04 12:38:36,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:38:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-04 12:38:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:38:36,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:36,893 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-04 12:38:36,894 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:36,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-04 12:38:36,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:36,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:36,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:36,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:36,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:38,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:38,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:38,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:38,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:38,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:38,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:38:38,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:38:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:38:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:38,273 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-04 12:38:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:41,237 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 12:38:41,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:38:41,238 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-04 12:38:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:41,238 INFO L225 Difference]: With dead ends: 158 [2018-10-04 12:38:41,238 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:38:41,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:38:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-04 12:38:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:38:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 12:38:41,245 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-04 12:38:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:41,245 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 12:38:41,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:38:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 12:38:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:38:41,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:41,246 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 12:38:41,246 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:41,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-04 12:38:41,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:41,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:41,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:41,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:41,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:42,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:42,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:42,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:42,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:42,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:42,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:42,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:42,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:38:42,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:38:42,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:38:42,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:42,314 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-04 12:38:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:42,782 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-04 12:38:42,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:38:42,783 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 12:38:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:42,783 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:38:42,784 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:38:42,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:38:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:38:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:38:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 12:38:42,791 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-04 12:38:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:42,791 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 12:38:42,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:38:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 12:38:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:38:42,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:42,792 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 12:38:42,792 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:42,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-04 12:38:42,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:42,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:42,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:43,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:43,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:43,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:43,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-04 12:38:43,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:43,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:43,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:43,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:38:43,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:38:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:38:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:43,898 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-04 12:38:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:44,046 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 12:38:44,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:38:44,046 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 12:38:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:44,047 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:38:44,047 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:38:44,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:38:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:38:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:38:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-04 12:38:44,053 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-04 12:38:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-04 12:38:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:38:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-04 12:38:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 12:38:44,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:44,054 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-04 12:38:44,054 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:44,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-04 12:38:44,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:44,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:44,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:45,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:45,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:45,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:45,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:45,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:45,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:45,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:45,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:38:45,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:38:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:38:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:45,499 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-04 12:38:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:48,609 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-04 12:38:48,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:38:48,609 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-04 12:38:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:48,610 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:38:48,610 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 12:38:48,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 12:38:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-04 12:38:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:38:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 12:38:48,617 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-04 12:38:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:48,617 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 12:38:48,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:38:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 12:38:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:38:48,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:48,618 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 12:38:48,618 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:48,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-04 12:38:48,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:48,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:48,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:49,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:49,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:38:49,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-04 12:38:49,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:49,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:49,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:49,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:38:49,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:38:49,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:38:49,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:49,815 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-04 12:38:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:50,664 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-04 12:38:50,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:38:50,664 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:38:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:50,665 INFO L225 Difference]: With dead ends: 162 [2018-10-04 12:38:50,665 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:38:50,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:38:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:38:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:38:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 12:38:50,672 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-04 12:38:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:50,672 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 12:38:50,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:38:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 12:38:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:38:50,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:50,673 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 12:38:50,673 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:50,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-04 12:38:50,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:50,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:50,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:50,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:50,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:51,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:51,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:51,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:38:51,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 12:38:51,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:51,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:51,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:51,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:38:51,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:38:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:38:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:51,820 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 12:38:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:51,974 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-04 12:38:51,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:38:51,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:38:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:51,975 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:38:51,975 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 12:38:51,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 12:38:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 12:38:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:38:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-04 12:38:51,983 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-04 12:38:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:51,983 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-04 12:38:51,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:38:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-04 12:38:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:38:51,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:51,983 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-04 12:38:51,984 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:51,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-04 12:38:51,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:51,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:51,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:53,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:53,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:53,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:53,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:53,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:53,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:38:53,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:38:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:38:53,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:53,480 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-04 12:38:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:56,689 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 12:38:56,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:38:56,690 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-04 12:38:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:56,690 INFO L225 Difference]: With dead ends: 164 [2018-10-04 12:38:56,690 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:38:56,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:38:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-04 12:38:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:38:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 12:38:56,698 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 12:38:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:56,698 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 12:38:56,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:38:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 12:38:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:38:56,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:56,699 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 12:38:56,699 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:56,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:56,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-04 12:38:56,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:56,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:56,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:56,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:56,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:57,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:57,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:57,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:57,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:57,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:57,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:57,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:57,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:38:57,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:38:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:38:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:57,817 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-04 12:38:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:58,439 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-04 12:38:58,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:38:58,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 12:38:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:58,440 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:38:58,440 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:38:58,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:38:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:38:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:38:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 12:38:58,447 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-04 12:38:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:58,447 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 12:38:58,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:38:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 12:38:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:38:58,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:58,448 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 12:38:58,448 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:58,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-04 12:38:58,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:58,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:58,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:58,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:58,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:59,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:38:59,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:38:59,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:59,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:38:59,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:59,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:59,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:38:59,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:38:59,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:38:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:38:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:59,647 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-04 12:38:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:59,830 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 12:38:59,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:38:59,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 12:38:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:59,831 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:38:59,832 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:38:59,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:38:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 12:38:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:38:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-04 12:38:59,838 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-04 12:38:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:59,839 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-04 12:38:59,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:38:59,839 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-04 12:38:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 12:38:59,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:59,839 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-04 12:38:59,839 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:38:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-04 12:38:59,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:59,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:59,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:01,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:01,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:01,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:39:01,318 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:39:01,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:01,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:01,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:01,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:39:01,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:39:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:39:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:39:01,369 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-04 12:39:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:04,699 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-04 12:39:04,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:39:04,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-04 12:39:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:04,701 INFO L225 Difference]: With dead ends: 167 [2018-10-04 12:39:04,701 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 12:39:04,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:39:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 12:39:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-04 12:39:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:39:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 12:39:04,708 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-04 12:39:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:04,709 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 12:39:04,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:39:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 12:39:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:39:04,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:04,709 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 12:39:04,709 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:04,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-04 12:39:04,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:04,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:04,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:05,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:05,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:05,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:39:05,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:39:05,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:05,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:05,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:05,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:39:05,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:39:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:39:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:05,909 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-04 12:39:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:06,768 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-04 12:39:06,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:39:06,768 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:39:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:06,769 INFO L225 Difference]: With dead ends: 168 [2018-10-04 12:39:06,769 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:39:06,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:39:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:39:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:39:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 12:39:06,776 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-04 12:39:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:06,776 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 12:39:06,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:39:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 12:39:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:39:06,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:06,777 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 12:39:06,777 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:06,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-04 12:39:06,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:06,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:06,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:06,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:06,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:08,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:08,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:08,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:39:08,533 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:39:08,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:08,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:08,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:08,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:39:08,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:39:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:39:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:08,578 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 12:39:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:08,753 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-04 12:39:08,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:39:08,754 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:39:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:08,754 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:39:08,754 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 12:39:08,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 12:39:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 12:39:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:39:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-04 12:39:08,762 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-04 12:39:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:08,762 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-04 12:39:08,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:39:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-04 12:39:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 12:39:08,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:08,763 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-04 12:39:08,763 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:08,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-04 12:39:08,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:08,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:08,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:08,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:08,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:10,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:10,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:10,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:10,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:10,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:10,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:39:10,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:39:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:39:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:10,343 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-04 12:39:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:13,792 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 12:39:13,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:39:13,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-04 12:39:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:13,793 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:39:13,793 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:39:13,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:39:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:39:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-04 12:39:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 12:39:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-04 12:39:13,802 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-04 12:39:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:13,802 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-04 12:39:13,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:39:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-04 12:39:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:39:13,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:13,803 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 12:39:13,803 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:13,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:13,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-04 12:39:13,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:13,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:13,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:13,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:13,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:14,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:14,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:14,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:39:14,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:39:14,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:14,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:14,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:14,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:39:14,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:39:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:39:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:14,970 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-04 12:39:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:15,496 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-04 12:39:15,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:39:15,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 12:39:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:15,497 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:39:15,497 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:39:15,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:39:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:39:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:39:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 12:39:15,505 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-04 12:39:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:15,505 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 12:39:15,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:39:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 12:39:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:39:15,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:15,505 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 12:39:15,505 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:15,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-04 12:39:15,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:15,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:15,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:15,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:15,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:16,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:16,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:16,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:39:16,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:39:16,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:16,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:16,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:16,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:39:16,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:39:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:39:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:16,779 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-04 12:39:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:16,943 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 12:39:16,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:39:16,944 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 12:39:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:16,944 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:39:16,944 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 12:39:16,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 12:39:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 12:39:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 12:39:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-04 12:39:16,954 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-04 12:39:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:16,954 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-04 12:39:16,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:39:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-04 12:39:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 12:39:16,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:16,955 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-04 12:39:16,955 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:16,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-04 12:39:16,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:16,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:16,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:16,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:16,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:18,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:18,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:18,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:39:18,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:39:18,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:18,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:18,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:18,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:39:18,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:39:18,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:39:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:18,602 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-04 12:39:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:22,210 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-04 12:39:22,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:39:22,211 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-04 12:39:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:22,212 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:39:22,212 INFO L226 Difference]: Without dead ends: 170 [2018-10-04 12:39:22,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-04 12:39:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-04 12:39:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 12:39:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 12:39:22,222 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-04 12:39:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:22,222 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 12:39:22,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:39:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 12:39:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:39:22,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:22,223 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 12:39:22,223 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:22,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-04 12:39:22,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:22,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:22,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:22,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:22,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:23,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:23,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:23,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:39:23,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-04 12:39:23,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:23,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:23,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:23,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:39:23,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:39:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:39:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:23,474 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-04 12:39:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:23,849 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-04 12:39:23,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:39:23,850 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:39:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:23,850 INFO L225 Difference]: With dead ends: 174 [2018-10-04 12:39:23,850 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:39:23,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:39:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:39:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:39:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 12:39:23,860 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-04 12:39:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:23,860 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 12:39:23,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:39:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 12:39:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:39:23,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:23,861 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 12:39:23,861 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:23,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-04 12:39:23,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:23,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:23,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:23,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:23,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:25,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:25,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:25,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:39:25,139 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 12:39:25,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:25,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:25,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:25,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:39:25,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:39:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:39:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:25,185 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 12:39:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:25,364 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-04 12:39:25,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:39:25,365 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:39:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:25,365 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:39:25,366 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 12:39:25,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 12:39:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 12:39:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 12:39:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-04 12:39:25,374 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-04 12:39:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:25,374 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-04 12:39:25,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:39:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-04 12:39:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 12:39:25,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:25,374 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-04 12:39:25,374 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:25,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-04 12:39:25,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:25,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:25,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:25,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:25,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:26,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:26,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:26,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:27,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:27,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:27,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:39:27,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:39:27,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:39:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:27,054 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-04 12:39:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:30,768 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 12:39:30,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:39:30,768 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-04 12:39:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:30,769 INFO L225 Difference]: With dead ends: 176 [2018-10-04 12:39:30,769 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:39:30,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:39:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-04 12:39:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 12:39:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 12:39:30,777 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-04 12:39:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:30,778 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 12:39:30,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:39:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 12:39:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:39:30,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:30,778 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 12:39:30,778 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:30,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-04 12:39:30,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:30,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:30,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:30,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:30,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:31,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:31,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:31,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:39:31,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:39:31,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:31,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:32,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:32,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:39:32,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:39:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:39:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:32,038 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-04 12:39:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:32,593 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-04 12:39:32,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:39:32,593 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 12:39:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:32,594 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:39:32,594 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:39:32,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:39:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:39:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:39:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 12:39:32,604 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-04 12:39:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:32,604 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 12:39:32,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:39:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 12:39:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:39:32,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:32,605 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 12:39:32,605 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:32,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-04 12:39:32,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:32,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:32,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:32,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:32,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:33,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:33,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:33,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:39:33,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 12:39:33,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:33,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:33,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:33,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:39:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:39:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:39:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:33,982 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-04 12:39:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:34,167 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 12:39:34,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:39:34,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 12:39:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:34,168 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:39:34,168 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 12:39:34,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 12:39:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 12:39:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 12:39:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-04 12:39:34,176 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-04 12:39:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:34,176 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-04 12:39:34,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:39:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-04 12:39:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 12:39:34,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:34,177 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-04 12:39:34,177 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:34,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-04 12:39:34,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:34,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:34,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:34,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:34,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:35,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:35,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:35,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:39:35,865 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:39:35,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:35,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:35,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:35,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:39:35,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:39:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:39:35,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:35,919 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-10-04 12:39:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:39,782 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-10-04 12:39:39,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:39:39,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-10-04 12:39:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:39,783 INFO L225 Difference]: With dead ends: 179 [2018-10-04 12:39:39,783 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 12:39:39,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 12:39:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-10-04 12:39:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 12:39:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-04 12:39:39,790 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-10-04 12:39:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:39,791 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-04 12:39:39,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:39:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-04 12:39:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:39:39,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:39,791 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-04 12:39:39,791 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:39,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-10-04 12:39:39,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:39,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:39,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:39,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:39,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:40,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:40,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:40,979 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:39:41,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:39:41,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:41,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:41,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:41,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:39:41,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:39:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:39:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:41,144 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-10-04 12:39:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:41,644 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-04 12:39:41,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:39:41,645 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:39:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:41,645 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:39:41,645 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:39:41,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:39:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:39:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:39:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 12:39:41,653 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-10-04 12:39:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:41,653 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 12:39:41,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:39:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 12:39:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:39:41,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:41,654 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-04 12:39:41,654 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:41,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-10-04 12:39:41,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:41,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:41,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:41,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:41,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:42,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:39:42,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:39:42,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:39:43,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-04 12:39:43,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:43,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:43,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:39:43,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:39:43,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:39:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:39:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:43,048 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-04 12:39:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:43,237 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-10-04 12:39:43,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:39:43,237 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:39:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:43,238 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:39:43,238 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 12:39:43,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 12:39:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 12:39:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 12:39:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-04 12:39:43,248 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-10-04 12:39:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:43,248 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-04 12:39:43,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:39:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-04 12:39:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 12:39:43,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:43,249 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-10-04 12:39:43,249 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:39:43,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-10-04 12:39:43,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:43,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:43,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 12:39:44,752 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:39:44,756 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:39:44,756 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:39:44 BoogieIcfgContainer [2018-10-04 12:39:44,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:39:44,757 INFO L168 Benchmark]: Toolchain (without parser) took 235462.92 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 448.2 MB). Peak memory consumption was 293.0 MB. Max. memory is 7.1 GB. [2018-10-04 12:39:44,759 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:39:44,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:39:44,759 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:39:44,759 INFO L168 Benchmark]: RCFGBuilder took 330.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:39:44,760 INFO L168 Benchmark]: TraceAbstraction took 235068.82 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 427.0 MB). Peak memory consumption was 271.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:39:44,762 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.05 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 330.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235068.82 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 427.0 MB). Peak memory consumption was 271.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 56 known predicates. - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 56 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 235.0s OverallTime, 172 OverallIterations, 57 TraceHistogramMax, 108.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 687 SDtfs, 1599 SDslu, 6279 SDs, 0 SdLazy, 161993 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20333 GetRequests, 15149 SyntacticMatches, 112 SemanticMatches, 5072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 101.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 171 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 106.9s InterpolantComputationTime, 21071 NumberOfCodeBlocks, 21071 NumberOfCodeBlocksAsserted, 1641 NumberOfCheckSat, 20732 ConstructedInterpolants, 0 QuantifiedInterpolants, 6983148 SizeOfPredicates, 112 NumberOfNonLiveVariables, 45612 ConjunctsInSsa, 13272 ConjunctsInUnsatCore, 339 InterpolantComputations, 3 PerfectInterpolantSequences, 130033/376881 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-39-44-770.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-39-44-770.csv Completed graceful shutdown