java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:48:14,063 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:48:14,065 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:48:14,080 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:48:14,081 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:48:14,083 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:48:14,084 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:48:14,085 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:48:14,087 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:48:14,088 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:48:14,089 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:48:14,114 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:48:14,129 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:48:14,129 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:48:14,130 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:48:14,130 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:48:14,131 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:48:14,131 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:48:14,131 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:48:14,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:48:14,132 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:48:14,132 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:48:14,132 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:48:14,132 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:48:14,133 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:48:14,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:48:14,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:48:14,134 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:48:14,134 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:48:14,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:48:14,135 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:48:14,135 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:48:14,135 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:48:14,135 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:48:14,135 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:48:14,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:48:14,136 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:48:14,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:48:14,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:48:14,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:48:14,217 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:48:14,218 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:48:14,218 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-23 19:48:14,219 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-23 19:48:14,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:48:14,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:48:14,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:48:14,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:48:14,280 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:48:14,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,322 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:48:14,322 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:48:14,323 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:48:14,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:48:14,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:48:14,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:48:14,326 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:48:14,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... [2018-09-23 19:48:14,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:48:14,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:48:14,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:48:14,355 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:48:14,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:48:14,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:48:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:48:14,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:48:14,648 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:48:14,649 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:48:14 BoogieIcfgContainer [2018-09-23 19:48:14,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:48:14,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:48:14,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:48:14,654 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:48:14,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:14" (1/2) ... [2018-09-23 19:48:14,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bbec66 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:48:14, skipping insertion in model container [2018-09-23 19:48:14,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:48:14" (2/2) ... [2018-09-23 19:48:14,657 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-23 19:48:14,667 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:48:14,675 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:48:14,723 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:48:14,724 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:48:14,725 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:48:14,725 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:48:14,725 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:48:14,725 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:48:14,725 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:48:14,726 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:48:14,726 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:48:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:48:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 19:48:14,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:14,749 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 19:48:14,750 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:14,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-23 19:48:14,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:14,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:14,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:14,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:14,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:14,940 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:48:14,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:48:14,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:48:14,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:48:14,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:14,961 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:48:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:15,037 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-23 19:48:15,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:48:15,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 19:48:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:15,061 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:48:15,062 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:48:15,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:48:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:48:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:48:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-23 19:48:15,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-23 19:48:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:15,107 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-23 19:48:15,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:48:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-23 19:48:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:48:15,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:15,108 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:48:15,109 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:15,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-23 19:48:15,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:15,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:15,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,182 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:48:15,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:48:15,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:48:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:48:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:15,185 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-23 19:48:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:15,212 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-23 19:48:15,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:48:15,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 19:48:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:15,215 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:48:15,216 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:48:15,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:48:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:48:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:48:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 19:48:15,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-23 19:48:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:15,228 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 19:48:15,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:48:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 19:48:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:48:15,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:15,232 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:48:15,232 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:15,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-23 19:48:15,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:15,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:15,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:15,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:15,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 19:48:15,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:48:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:48:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:48:15,381 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-23 19:48:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:15,508 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-23 19:48:15,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:48:15,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-23 19:48:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:15,509 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:48:15,509 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:48:15,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:48:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:48:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:48:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:48:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 19:48:15,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-23 19:48:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:15,514 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 19:48:15,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:48:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 19:48:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:48:15,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:15,515 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-23 19:48:15,515 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:15,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-23 19:48:15,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:15,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:15,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:15,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:15,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:48:15,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:48:15,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:48:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:48:15,738 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-23 19:48:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:15,779 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-23 19:48:15,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:48:15,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 19:48:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:15,780 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:48:15,780 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:48:15,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:48:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:48:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:48:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:48:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-23 19:48:15,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-23 19:48:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:15,786 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-23 19:48:15,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:48:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-23 19:48:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:48:15,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:15,787 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-23 19:48:15,787 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:15,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-23 19:48:15,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:15,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:15,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:15,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:15,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:15,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:15,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:15,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:15,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:16,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:48:16,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:48:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:48:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:48:16,003 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-23 19:48:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:16,062 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-23 19:48:16,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:48:16,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:48:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:16,064 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:48:16,064 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:48:16,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:48:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:48:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:48:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:48:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-23 19:48:16,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-23 19:48:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:16,071 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-23 19:48:16,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:48:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-23 19:48:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:48:16,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:16,073 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-23 19:48:16,073 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:16,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-23 19:48:16,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:16,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:16,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:16,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:16,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:16,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:16,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:16,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:16,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:48:16,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:48:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:48:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:48:16,264 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-23 19:48:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:16,345 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-23 19:48:16,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:48:16,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-23 19:48:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:16,346 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:48:16,347 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:48:16,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:48:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:48:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:48:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:48:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 19:48:16,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-23 19:48:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:16,353 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 19:48:16,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:48:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 19:48:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:48:16,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:16,354 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-23 19:48:16,354 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:16,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:16,355 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-23 19:48:16,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:16,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:16,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:16,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:16,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:16,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:16,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:48:16,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:16,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:16,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:48:16,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:48:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:48:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:48:16,566 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-23 19:48:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:16,601 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-23 19:48:16,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:48:16,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-23 19:48:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:16,602 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:48:16,602 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:48:16,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:48:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:48:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:48:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:48:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 19:48:16,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-23 19:48:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:16,608 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 19:48:16,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:48:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 19:48:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:48:16,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:16,609 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-23 19:48:16,610 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:16,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-23 19:48:16,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:16,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:16,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:16,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:16,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:16,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:16,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:48:16,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:16,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:16,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 19:48:16,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:48:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:48:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:48:16,909 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-23 19:48:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:17,456 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-23 19:48:17,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:48:17,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-23 19:48:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:17,457 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:48:17,457 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:48:17,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:48:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:48:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:48:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:48:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-23 19:48:17,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-23 19:48:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:17,463 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-23 19:48:17,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:48:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-23 19:48:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:48:17,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:17,464 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-23 19:48:17,464 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:17,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-23 19:48:17,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:17,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:17,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:17,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:17,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:17,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:17,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:17,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:17,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:17,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:17,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:17,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:48:17,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:48:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:48:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:48:17,627 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-23 19:48:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:17,657 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-23 19:48:17,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:48:17,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-23 19:48:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:17,658 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:48:17,658 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:48:17,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:48:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:48:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:48:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:48:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-23 19:48:17,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-23 19:48:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:17,664 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-23 19:48:17,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:48:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-23 19:48:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:48:17,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:17,665 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-23 19:48:17,665 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:17,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-23 19:48:17,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:17,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:17,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:17,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:17,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:17,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:17,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:17,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:17,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:17,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:48:17,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:48:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:48:17,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:17,811 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-23 19:48:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:17,873 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-23 19:48:17,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:48:17,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-23 19:48:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:17,874 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:48:17,874 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:48:17,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:48:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:48:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:48:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-23 19:48:17,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-23 19:48:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:17,880 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-23 19:48:17,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:48:17,880 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-23 19:48:17,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:48:17,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:17,881 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-23 19:48:17,881 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:17,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-23 19:48:17,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:17,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:17,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:17,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:18,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:18,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:18,056 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:48:18,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:18,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:18,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:48:18,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:48:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:48:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:18,094 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-23 19:48:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:18,150 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-23 19:48:18,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:48:18,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-23 19:48:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:18,152 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:48:18,152 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:48:18,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:48:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:48:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:48:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-23 19:48:18,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-23 19:48:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:18,158 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-23 19:48:18,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:48:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-23 19:48:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:48:18,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:18,159 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-23 19:48:18,159 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:18,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-23 19:48:18,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:18,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:18,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:18,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:18,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:18,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:18,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:48:18,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:18,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:18,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:48:18,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:48:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:48:18,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:48:18,365 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-23 19:48:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:18,406 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-23 19:48:18,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:48:18,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-23 19:48:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:18,408 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:48:18,408 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:48:18,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:48:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:48:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:48:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:48:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 19:48:18,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-23 19:48:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:18,414 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 19:48:18,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:48:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 19:48:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:48:18,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:18,416 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-23 19:48:18,416 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:18,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-23 19:48:18,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:18,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:18,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:18,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:18,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:18,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:18,570 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:48:18,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:18,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:18,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 19:48:18,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:48:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:48:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:48:18,797 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-23 19:48:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:19,312 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-23 19:48:19,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:48:19,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-23 19:48:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:19,313 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:48:19,313 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:48:19,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:48:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:48:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:48:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:48:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-23 19:48:19,321 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-23 19:48:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:19,321 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-23 19:48:19,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:48:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-23 19:48:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:48:19,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:19,323 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-23 19:48:19,324 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:19,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:19,324 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-23 19:48:19,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:19,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:19,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:19,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:19,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:19,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:19,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:19,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:19,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:19,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:48:19,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:48:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:48:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:48:19,687 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-23 19:48:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:19,714 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-23 19:48:19,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:48:19,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-23 19:48:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:19,716 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:48:19,716 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:48:19,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:48:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:48:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:48:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:48:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-23 19:48:19,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-23 19:48:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:19,722 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-23 19:48:19,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:48:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-23 19:48:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:48:19,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:19,723 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-23 19:48:19,723 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:19,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-23 19:48:19,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:19,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:19,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:19,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:19,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:19,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:19,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:19,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:48:19,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:19,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:19,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:19,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:48:19,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:48:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:48:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:48:19,935 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-23 19:48:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:19,979 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-23 19:48:19,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:48:19,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-23 19:48:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:19,980 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:48:19,980 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:48:19,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:48:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:48:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:48:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:48:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-23 19:48:19,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-23 19:48:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:19,986 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-23 19:48:19,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:48:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-23 19:48:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:48:19,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:19,987 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-23 19:48:19,987 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:19,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-23 19:48:19,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:19,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:20,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:20,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:20,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:20,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:20,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:20,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:48:20,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:48:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:48:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:48:20,235 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-23 19:48:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:20,276 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-23 19:48:20,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:48:20,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-23 19:48:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:20,278 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:48:20,278 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:48:20,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:48:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:48:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:48:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:48:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-23 19:48:20,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-23 19:48:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:20,284 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-23 19:48:20,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:48:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-23 19:48:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:48:20,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:20,285 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-23 19:48:20,286 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:20,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-23 19:48:20,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:20,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:20,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:20,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:20,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:20,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:20,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:20,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:20,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:48:20,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:48:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:48:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:48:20,481 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-23 19:48:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:20,525 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-23 19:48:20,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:48:20,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-23 19:48:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:20,532 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:48:20,533 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:48:20,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:48:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:48:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:48:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:48:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-23 19:48:20,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-23 19:48:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:20,541 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-23 19:48:20,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:48:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-23 19:48:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:48:20,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:20,544 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-23 19:48:20,544 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:20,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-23 19:48:20,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:20,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:20,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:20,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:20,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:20,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:20,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:20,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 19:48:20,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:20,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:21,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:21,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 19:48:21,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:48:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:48:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:48:21,239 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-23 19:48:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:21,953 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-23 19:48:21,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:48:21,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-23 19:48:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:21,955 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:48:21,955 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:48:21,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:48:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:48:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:48:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:48:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-23 19:48:21,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-23 19:48:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:21,963 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-23 19:48:21,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:48:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-23 19:48:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:48:21,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:21,964 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-23 19:48:21,964 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:21,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-23 19:48:21,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:21,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:21,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:21,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:21,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:22,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:22,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:22,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:22,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:22,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:22,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:22,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:22,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 19:48:22,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:48:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:48:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:48:22,365 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-23 19:48:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:22,787 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-23 19:48:22,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:48:22,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-23 19:48:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:22,789 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:48:22,789 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:48:22,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:48:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:48:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:48:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:48:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-23 19:48:22,794 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-23 19:48:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:22,795 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-23 19:48:22,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:48:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-23 19:48:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:48:22,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:22,796 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-23 19:48:22,796 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:22,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:22,797 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-23 19:48:22,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:22,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:22,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:22,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:22,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:22,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:22,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:22,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:22,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:48:22,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:22,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:23,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:23,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:48:23,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:48:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:48:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:48:23,007 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-23 19:48:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:23,076 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-23 19:48:23,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:48:23,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-23 19:48:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:23,080 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:48:23,080 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:48:23,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:48:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:48:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:48:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:48:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-23 19:48:23,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-23 19:48:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:23,085 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-23 19:48:23,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:48:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-23 19:48:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:48:23,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:23,087 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-23 19:48:23,087 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:23,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-23 19:48:23,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:23,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:23,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:23,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:23,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:23,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:23,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:23,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:23,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:23,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:23,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:23,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:48:23,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:48:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:48:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:48:23,314 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-23 19:48:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:23,375 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-23 19:48:23,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:48:23,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-23 19:48:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:23,377 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:48:23,377 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:48:23,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:48:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:48:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:48:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:48:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-23 19:48:23,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-23 19:48:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:23,383 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-23 19:48:23,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:48:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-23 19:48:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:48:23,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:23,384 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-23 19:48:23,385 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:23,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-23 19:48:23,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:23,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:23,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:23,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:23,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:23,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:23,570 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:23,607 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:48:23,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:23,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:24,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:24,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 19:48:24,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:48:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:48:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:48:24,111 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-23 19:48:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:24,866 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-23 19:48:24,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:48:24,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-23 19:48:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:24,870 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:48:24,870 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:48:24,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:48:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:48:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:48:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:48:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-23 19:48:24,876 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-23 19:48:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:24,877 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-23 19:48:24,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:48:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-23 19:48:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:48:24,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:24,878 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-23 19:48:24,878 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:24,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-23 19:48:24,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:24,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:25,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:25,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:25,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:25,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:25,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:48:25,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:48:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:48:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:48:25,152 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-23 19:48:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:25,207 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-23 19:48:25,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:48:25,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 19:48:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:25,209 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:48:25,209 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:48:25,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:48:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:48:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:48:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:48:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-23 19:48:25,215 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-23 19:48:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:25,216 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-23 19:48:25,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:48:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-23 19:48:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:48:25,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:25,217 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-23 19:48:25,217 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:25,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-23 19:48:25,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:25,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:25,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:25,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:25,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:25,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:25,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:25,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:25,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:48:25,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:25,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:25,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:25,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:48:25,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:48:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:48:25,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:48:25,556 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-23 19:48:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:25,813 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-23 19:48:25,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:48:25,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-23 19:48:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:25,814 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:48:25,815 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:48:25,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:48:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:48:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:48:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:48:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-23 19:48:25,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-23 19:48:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:25,820 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-23 19:48:25,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:48:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-23 19:48:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:48:25,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:25,821 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-23 19:48:25,821 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:25,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-23 19:48:25,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:25,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:25,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:25,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:25,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:26,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:26,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:26,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:26,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:26,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:26,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:26,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:26,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:48:26,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:48:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:48:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:48:26,594 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-23 19:48:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:26,636 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-23 19:48:26,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:48:26,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-23 19:48:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:26,637 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:48:26,637 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:48:26,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:48:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:48:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:48:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:48:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-23 19:48:26,642 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-23 19:48:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:26,642 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-23 19:48:26,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:48:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-23 19:48:26,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:48:26,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:26,643 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-23 19:48:26,643 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:26,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-23 19:48:26,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:26,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:26,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:26,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:26,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:26,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:26,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:26,856 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:26,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:26,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:26,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:26,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:26,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:48:26,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:48:26,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:48:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:48:26,906 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-23 19:48:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:27,017 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-23 19:48:27,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:48:27,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-23 19:48:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:27,018 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:48:27,019 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:48:27,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:48:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:48:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:48:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:48:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-23 19:48:27,022 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-23 19:48:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:27,023 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-23 19:48:27,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:48:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-23 19:48:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:48:27,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:27,024 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-23 19:48:27,024 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:27,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-23 19:48:27,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:27,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:27,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:27,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:27,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:27,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:27,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:27,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:27,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 19:48:27,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:27,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:28,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 19:48:28,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:48:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:48:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:48:28,075 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-23 19:48:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:29,611 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-23 19:48:29,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:48:29,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-23 19:48:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:29,612 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:48:29,613 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:48:29,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:48:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:48:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:48:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:48:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-23 19:48:29,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-23 19:48:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:29,619 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-23 19:48:29,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:48:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-23 19:48:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:48:29,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:29,620 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-23 19:48:29,620 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:29,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-23 19:48:29,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:29,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:29,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:29,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:29,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:29,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:29,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:29,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:29,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:29,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:29,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:29,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:29,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:48:29,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:48:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:48:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:48:29,861 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-23 19:48:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:29,917 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-23 19:48:29,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:48:29,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-23 19:48:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:29,918 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:48:29,918 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:48:29,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:48:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:48:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:48:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:48:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-23 19:48:29,923 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-23 19:48:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:29,923 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-23 19:48:29,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:48:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-23 19:48:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:48:29,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:29,924 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-23 19:48:29,924 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:29,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-23 19:48:29,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:29,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:29,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:29,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:29,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:30,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:30,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:30,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:30,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:48:30,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:30,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:30,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:30,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:48:30,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:48:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:48:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:30,212 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-23 19:48:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:30,288 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-23 19:48:30,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:48:30,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-23 19:48:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:30,289 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:48:30,289 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:48:30,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:48:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:48:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:48:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-23 19:48:30,293 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-23 19:48:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:30,294 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-23 19:48:30,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:48:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-23 19:48:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:48:30,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:30,295 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-23 19:48:30,295 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:30,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-23 19:48:30,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:30,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:30,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:30,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:30,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:30,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:30,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:30,550 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:48:30,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:30,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:30,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:30,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:48:30,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:48:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:48:30,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:30,595 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-23 19:48:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:30,685 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-23 19:48:30,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:48:30,686 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-23 19:48:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:30,687 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:48:30,687 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:48:30,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:48:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:48:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:48:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-23 19:48:30,692 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-23 19:48:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:30,692 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-23 19:48:30,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:48:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-23 19:48:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:48:30,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:30,693 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-23 19:48:30,693 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:30,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-23 19:48:30,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:30,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:31,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:31,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:31,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:48:31,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:31,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:31,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:31,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:48:31,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:48:31,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:48:31,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:48:31,318 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-23 19:48:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:31,407 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-23 19:48:31,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:48:31,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-23 19:48:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:31,409 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:48:31,409 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:48:31,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:48:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:48:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:48:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:48:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-23 19:48:31,414 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-23 19:48:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:31,414 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-23 19:48:31,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:48:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-23 19:48:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:48:31,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:31,415 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-23 19:48:31,415 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:31,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-23 19:48:31,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:31,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:31,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:31,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:31,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:31,776 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:31,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 19:48:31,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:31,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:32,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:32,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 19:48:32,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:48:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:48:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:48:32,197 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-23 19:48:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:33,275 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-23 19:48:33,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:48:33,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-23 19:48:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:33,277 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:48:33,277 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:48:33,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:48:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:48:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:48:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:48:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-23 19:48:33,283 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-23 19:48:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:33,283 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-23 19:48:33,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:48:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-23 19:48:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:48:33,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:33,284 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-23 19:48:33,285 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:33,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-23 19:48:33,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:33,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:33,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:33,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:33,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:33,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:33,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:33,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:33,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:48:33,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:48:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:48:33,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:48:33,660 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-23 19:48:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:33,701 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-23 19:48:33,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:48:33,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-23 19:48:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:33,703 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:48:33,703 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:48:33,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:48:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:48:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:48:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:48:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-23 19:48:33,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-23 19:48:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:33,708 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-23 19:48:33,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:48:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-23 19:48:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:48:33,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:33,709 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-23 19:48:33,709 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:33,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-23 19:48:33,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:33,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:33,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:33,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:33,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:34,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:34,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:34,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:34,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:34,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:34,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:48:34,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:48:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:48:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:48:34,771 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-23 19:48:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:34,830 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-23 19:48:34,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:48:34,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-23 19:48:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:34,832 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:48:34,832 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:48:34,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:48:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:48:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:48:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:48:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-23 19:48:34,836 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-23 19:48:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:34,836 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-23 19:48:34,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:48:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-23 19:48:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:48:34,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:34,837 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-23 19:48:34,837 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:34,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-23 19:48:34,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:34,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:34,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:34,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:34,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:35,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:35,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:35,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:35,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:35,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:35,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:35,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:35,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:48:35,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:48:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:48:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:48:35,212 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-23 19:48:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:35,255 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-23 19:48:35,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:48:35,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-23 19:48:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:35,256 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:48:35,257 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:48:35,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:48:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:48:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:48:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:48:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-23 19:48:35,260 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-23 19:48:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:35,261 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-23 19:48:35,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:48:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-23 19:48:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:48:35,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:35,261 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-23 19:48:35,261 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:35,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-23 19:48:35,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:35,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:35,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:35,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:35,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:35,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:35,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:35,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:35,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:35,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:35,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:35,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:48:35,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:48:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:48:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:48:35,592 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-23 19:48:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:35,679 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-23 19:48:35,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:48:35,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-23 19:48:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:35,681 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:48:35,681 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:48:35,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:48:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:48:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:48:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:48:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-23 19:48:35,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-23 19:48:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:35,686 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-23 19:48:35,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:48:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-23 19:48:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:48:35,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:35,686 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-23 19:48:35,687 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:35,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-23 19:48:35,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:35,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:35,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:35,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:35,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:35,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:35,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:35,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:36,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 19:48:36,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:36,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:36,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:36,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 19:48:36,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:48:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:48:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:48:36,527 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-23 19:48:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:37,669 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-23 19:48:37,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:48:37,669 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-23 19:48:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:37,670 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:48:37,670 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:48:37,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:48:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:48:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:48:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:48:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-23 19:48:37,676 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-23 19:48:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:37,676 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-23 19:48:37,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:48:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-23 19:48:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:48:37,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:37,677 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-23 19:48:37,677 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:37,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-23 19:48:37,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:37,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:37,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:37,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:37,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:38,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:38,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:38,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:38,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:38,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:38,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:39,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:39,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 19:48:39,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:48:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:48:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:48:39,064 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-23 19:48:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:40,613 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-23 19:48:40,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:48:40,613 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-23 19:48:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:40,614 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:48:40,614 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:48:40,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:48:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:48:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:48:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:48:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-23 19:48:40,621 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-23 19:48:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:40,621 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-23 19:48:40,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:48:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-23 19:48:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:48:40,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:40,622 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-23 19:48:40,622 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:40,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-23 19:48:40,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:40,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:40,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:40,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:40,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:40,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:40,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:40,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:41,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:48:41,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:41,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:41,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:41,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:48:41,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:48:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:48:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:48:41,050 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-23 19:48:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:41,153 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-23 19:48:41,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:48:41,154 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-23 19:48:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:41,155 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:48:41,155 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:48:41,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:48:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:48:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:48:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:48:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-23 19:48:41,160 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-23 19:48:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:41,160 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-23 19:48:41,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:48:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-23 19:48:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:48:41,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:41,161 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-23 19:48:41,161 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:41,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-23 19:48:41,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:41,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:41,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:41,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:41,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:41,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:41,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:41,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-23 19:48:41,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:41,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:41,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:41,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:48:41,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:48:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:48:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:48:41,775 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-23 19:48:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:41,884 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-23 19:48:41,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:48:41,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-23 19:48:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:41,886 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:48:41,886 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:48:41,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:48:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:48:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:48:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:48:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-23 19:48:41,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-23 19:48:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:41,892 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-23 19:48:41,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:48:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-23 19:48:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:48:41,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:41,893 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-23 19:48:41,893 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:41,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-23 19:48:41,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:41,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:41,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:41,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:42,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:42,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:42,431 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:48:42,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:42,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:42,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 19:48:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:48:42,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:48:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:48:42,959 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-23 19:48:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:44,263 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-23 19:48:44,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:48:44,264 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-23 19:48:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:44,265 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:48:44,265 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:48:44,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:48:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:48:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:48:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:48:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-23 19:48:44,270 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-23 19:48:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:44,270 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-23 19:48:44,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:48:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-23 19:48:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:48:44,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:44,271 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-23 19:48:44,271 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:44,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-23 19:48:44,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:44,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:44,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:44,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:45,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:45,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:48:45,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:48:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:48:45,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:48:45,045 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-23 19:48:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:45,109 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-23 19:48:45,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:48:45,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-23 19:48:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:45,111 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:48:45,111 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:48:45,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:48:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:48:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:48:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:48:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-23 19:48:45,116 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-23 19:48:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:45,116 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-23 19:48:45,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:48:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-23 19:48:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:48:45,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:45,117 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-23 19:48:45,117 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:45,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-23 19:48:45,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:45,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:45,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:45,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:45,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:45,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:45,520 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:45,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:45,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:45,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:48:45,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:48:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:48:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:48:45,552 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-23 19:48:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:45,615 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-23 19:48:45,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:48:45,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-23 19:48:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:45,617 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:48:45,617 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:48:45,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:48:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:48:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:48:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:48:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-23 19:48:45,621 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-23 19:48:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:45,621 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-23 19:48:45,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:48:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-23 19:48:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:48:45,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:45,622 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-23 19:48:45,622 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:45,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-23 19:48:45,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:45,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:45,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:45,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:46,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:46,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:46,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:46,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:46,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:46,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:48:46,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:48:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:48:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:48:46,075 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-23 19:48:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:46,153 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-23 19:48:46,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:48:46,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-23 19:48:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:46,154 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:48:46,154 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:48:46,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:48:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:48:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:48:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:48:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-23 19:48:46,160 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-23 19:48:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:46,160 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-23 19:48:46,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:48:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-23 19:48:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:48:46,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:46,161 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-23 19:48:46,161 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:46,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-23 19:48:46,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:46,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:46,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:46,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:46,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:46,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:46,864 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:48:46,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:46,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:46,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:48:46,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:48:46,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:48:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:48:46,908 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-23 19:48:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:46,956 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-23 19:48:46,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:48:46,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-23 19:48:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:46,958 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:48:46,958 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:48:46,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:48:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:48:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:48:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:48:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-23 19:48:46,963 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-23 19:48:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:46,963 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-23 19:48:46,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:48:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-23 19:48:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:48:46,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:46,963 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-23 19:48:46,964 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:46,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-23 19:48:46,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:46,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:46,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:46,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:47,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:47,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:47,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 19:48:47,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:47,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:48,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 19:48:48,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:48:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:48:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:48:48,085 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-23 19:48:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:50,153 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-23 19:48:50,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:48:50,154 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-23 19:48:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:50,155 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:48:50,155 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:48:50,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-23 19:48:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:48:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:48:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:48:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-23 19:48:50,161 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-23 19:48:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:50,162 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-23 19:48:50,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:48:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-23 19:48:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:48:50,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:50,163 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-23 19:48:50,163 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:50,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-23 19:48:50,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:50,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:50,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:50,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:50,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:50,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:50,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:50,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:50,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:50,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:48:50,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:48:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:48:50,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:48:50,783 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-23 19:48:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:50,894 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-23 19:48:50,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:48:50,895 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-23 19:48:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:50,896 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:48:50,896 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:48:50,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:48:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:48:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:48:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:48:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-23 19:48:50,899 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-23 19:48:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:50,900 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-23 19:48:50,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:48:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-23 19:48:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:48:50,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:50,900 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-23 19:48:50,901 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:50,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-23 19:48:50,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:50,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:50,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:51,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:51,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:51,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:51,513 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-23 19:48:51,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:51,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:51,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:51,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:48:51,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:48:51,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:48:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:51,570 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-23 19:48:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:52,016 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-23 19:48:52,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:48:52,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-23 19:48:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:52,017 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:48:52,017 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:48:52,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:48:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:48:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:48:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-23 19:48:52,022 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-23 19:48:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:52,022 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-23 19:48:52,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:48:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-23 19:48:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:48:52,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:52,023 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-23 19:48:52,023 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:52,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-23 19:48:52,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:52,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:52,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:52,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:52,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:52,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:52,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:52,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:48:52,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:52,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:52,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:52,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:48:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:48:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:48:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:52,685 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-23 19:48:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:52,786 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-23 19:48:52,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:48:52,787 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-23 19:48:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:52,788 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:48:52,788 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:48:52,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:48:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:48:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:48:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-23 19:48:52,794 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-23 19:48:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:52,794 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-23 19:48:52,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:48:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-23 19:48:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:48:52,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:52,795 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-23 19:48:52,795 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:52,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-23 19:48:52,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:52,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:52,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:52,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:53,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:53,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:53,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:53,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:48:53,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:48:53,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:48:53,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:48:53,542 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-23 19:48:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:53,615 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-23 19:48:53,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:48:53,615 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-23 19:48:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:53,617 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:48:53,617 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:48:53,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:48:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:48:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:48:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:48:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-23 19:48:53,621 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-23 19:48:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:53,621 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-23 19:48:53,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:48:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-23 19:48:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:48:53,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:53,622 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-23 19:48:53,622 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:53,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-23 19:48:53,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:53,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:53,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:53,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:54,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:54,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:54,156 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:54,209 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 19:48:54,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:54,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:55,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 19:48:55,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:48:55,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:48:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:48:55,491 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-23 19:48:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:57,722 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-23 19:48:57,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:48:57,722 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-23 19:48:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:57,724 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:48:57,724 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:48:57,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-23 19:48:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:48:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:48:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:48:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-23 19:48:57,729 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-23 19:48:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:57,729 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-23 19:48:57,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:48:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-23 19:48:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:48:57,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:57,730 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-23 19:48:57,730 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:57,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-23 19:48:57,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:57,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:57,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:57,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:57,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:58,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:58,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:58,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:48:58,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:48:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:48:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:48:58,481 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-23 19:48:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:58,529 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-23 19:48:58,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:48:58,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-23 19:48:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:58,530 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:48:58,530 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:48:58,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:48:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:48:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:48:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:48:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-23 19:48:58,535 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-23 19:48:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:58,535 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-23 19:48:58,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:48:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-23 19:48:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:48:58,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:58,536 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-23 19:48:58,537 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:58,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:58,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-23 19:48:58,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:58,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:58,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:59,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:59,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:59,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:59,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:59,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:59,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:59,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:59,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:48:59,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:48:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:48:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:48:59,187 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-23 19:48:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:59,270 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-23 19:48:59,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:48:59,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-23 19:48:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:59,271 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:48:59,272 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:48:59,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:48:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:48:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:48:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:48:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-23 19:48:59,276 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-23 19:48:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:59,277 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-23 19:48:59,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:48:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-23 19:48:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:48:59,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:59,277 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-23 19:48:59,278 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:59,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-23 19:48:59,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:59,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:59,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:59,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:59,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:00,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:00,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:00,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:00,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:00,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:00,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:00,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:00,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:49:00,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:49:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:49:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:49:00,420 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-23 19:49:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:00,579 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-23 19:49:00,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:49:00,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-23 19:49:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:00,581 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:49:00,581 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:49:00,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:49:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:49:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:49:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:49:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-23 19:49:00,587 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-23 19:49:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:00,587 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-23 19:49:00,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:49:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-23 19:49:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:49:00,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:00,588 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-23 19:49:00,588 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:00,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-23 19:49:00,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:00,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:00,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:00,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:00,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:01,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:01,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:01,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:01,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:49:01,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:01,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:01,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:01,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:49:01,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:49:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:49:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:49:01,205 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-23 19:49:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:01,378 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-23 19:49:01,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:49:01,378 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-23 19:49:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:01,379 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:49:01,380 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:49:01,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:49:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:49:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:49:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:49:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-23 19:49:01,386 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-23 19:49:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:01,387 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-23 19:49:01,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:49:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-23 19:49:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:49:01,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:01,388 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-23 19:49:01,388 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:01,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-23 19:49:01,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:01,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:02,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:02,022 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 [2018-09-23 19:49:02,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:02,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-23 19:49:02,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:02,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:03,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:03,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 19:49:03,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:49:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:49:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:49:03,062 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-23 19:49:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:05,584 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-23 19:49:05,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:49:05,584 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-23 19:49:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:05,585 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:49:05,585 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:49:05,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-23 19:49:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:49:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:49:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:49:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-23 19:49:05,590 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-23 19:49:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:05,591 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-23 19:49:05,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:49:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-23 19:49:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:49:05,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:05,592 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-23 19:49:05,592 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:05,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-23 19:49:05,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:05,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:05,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:05,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:06,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:06,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:06,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:06,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:06,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:06,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:49:06,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:49:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:49:06,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:49:06,243 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-23 19:49:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:07,124 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-23 19:49:07,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:49:07,125 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-23 19:49:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:07,126 INFO L225 Difference]: With dead ends: 114 [2018-09-23 19:49:07,126 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:49:07,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:49:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:49:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:49:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:49:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-23 19:49:07,131 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-23 19:49:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:07,132 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-23 19:49:07,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:49:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-23 19:49:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:49:07,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:07,133 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-23 19:49:07,133 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:07,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-23 19:49:07,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:07,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:07,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:07,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:07,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:07,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:07,703 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:07,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:07,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:07,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:07,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:07,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:49:07,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:49:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:49:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:49:07,786 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-23 19:49:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:07,849 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-23 19:49:07,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:49:07,849 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-23 19:49:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:07,850 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:49:07,851 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:49:07,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:49:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:49:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:49:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:49:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-23 19:49:07,855 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-23 19:49:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:07,855 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-23 19:49:07,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:49:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-23 19:49:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:49:07,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:07,856 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-23 19:49:07,856 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:07,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-23 19:49:07,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:07,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:07,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:07,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:08,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:08,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:08,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:08,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:49:08,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:08,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:09,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:49:09,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:49:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:49:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:49:09,039 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-23 19:49:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:09,132 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-23 19:49:09,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:49:09,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-23 19:49:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:09,134 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:49:09,134 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:49:09,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:49:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:49:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:49:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:49:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-23 19:49:09,138 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-23 19:49:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:09,138 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-23 19:49:09,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:49:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-23 19:49:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:49:09,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:09,139 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-23 19:49:09,139 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:09,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-23 19:49:09,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:09,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:09,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:09,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:09,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:09,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:09,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:09,858 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:49:09,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:09,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:09,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:49:09,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:49:09,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:49:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:49:09,902 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-23 19:49:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:09,994 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-23 19:49:09,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:49:09,994 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-23 19:49:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:09,995 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:49:09,995 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:49:09,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:49:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:49:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:49:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:49:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-23 19:49:09,998 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-23 19:49:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:09,998 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-23 19:49:09,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:49:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-23 19:49:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:49:09,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:10,000 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-23 19:49:10,000 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:10,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-23 19:49:10,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:10,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:10,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:10,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:10,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:11,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:11,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:11,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:11,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 19:49:11,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:11,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:13,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:13,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 19:49:13,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:49:13,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:49:13,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:49:13,052 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-23 19:49:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:16,004 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-23 19:49:16,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:49:16,005 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-23 19:49:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:16,006 INFO L225 Difference]: With dead ends: 122 [2018-09-23 19:49:16,006 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:49:16,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-23 19:49:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:49:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 19:49:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 19:49:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-23 19:49:16,011 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-23 19:49:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:16,011 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-23 19:49:16,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:49:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-23 19:49:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:49:16,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:16,012 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-23 19:49:16,012 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:16,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-23 19:49:16,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:16,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:16,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:16,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:16,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:18,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:18,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:18,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:18,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:18,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:18,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:49:18,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:49:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:49:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:49:18,853 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-23 19:49:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:19,830 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-23 19:49:19,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:49:19,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-23 19:49:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:19,831 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:49:19,831 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:49:19,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:49:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:49:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:49:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:49:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-23 19:49:19,836 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-23 19:49:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:19,836 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-23 19:49:19,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:49:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-23 19:49:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:49:19,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:19,837 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-23 19:49:19,837 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:19,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-23 19:49:19,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:19,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:19,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:19,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:19,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:21,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:21,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:21,152 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-23 19:49:21,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:21,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:21,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:21,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:49:21,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:49:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:49:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:49:21,210 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-23 19:49:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:21,443 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-23 19:49:21,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:49:21,443 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-23 19:49:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:21,445 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:49:21,445 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:49:21,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:49:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:49:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:49:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:49:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-23 19:49:21,450 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-23 19:49:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:21,450 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-23 19:49:21,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:49:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-23 19:49:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 19:49:21,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:21,451 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-23 19:49:21,451 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:21,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-23 19:49:21,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:21,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:21,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:21,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:21,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:23,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:23,488 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) [2018-09-23 19:49:23,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:23,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:23,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:23,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:23,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:23,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:49:23,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:49:23,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:49:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:49:23,606 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-23 19:49:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:23,698 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-23 19:49:23,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:49:23,699 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-23 19:49:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:23,700 INFO L225 Difference]: With dead ends: 126 [2018-09-23 19:49:23,700 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 19:49:23,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:49:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 19:49:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-23 19:49:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 19:49:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-23 19:49:23,706 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-23 19:49:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:23,706 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-23 19:49:23,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:49:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-23 19:49:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 19:49:23,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:23,707 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-23 19:49:23,707 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:23,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-23 19:49:23,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:23,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:23,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:23,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:23,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:25,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:25,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:25,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:25,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:25,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:25,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:49:25,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:49:25,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:49:25,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:49:25,452 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-23 19:49:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:25,635 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-23 19:49:25,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:49:25,635 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-23 19:49:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:25,636 INFO L225 Difference]: With dead ends: 128 [2018-09-23 19:49:25,636 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 19:49:25,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:49:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 19:49:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-23 19:49:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:49:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-23 19:49:25,640 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-23 19:49:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:25,640 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-23 19:49:25,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:49:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-23 19:49:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:49:25,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:25,641 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-23 19:49:25,641 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:25,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-23 19:49:25,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:25,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:25,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:26,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:26,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:26,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:26,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-23 19:49:26,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:26,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:27,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:27,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 19:49:27,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:49:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:49:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:49:27,659 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-23 19:49:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:31,052 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-23 19:49:31,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:49:31,053 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-23 19:49:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:31,054 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:49:31,054 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:49:31,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-23 19:49:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:49:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:49:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:49:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-23 19:49:31,058 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-23 19:49:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:31,058 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-23 19:49:31,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:49:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-23 19:49:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 19:49:31,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,059 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-23 19:49:31,059 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-23 19:49:31,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:31,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:31,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:31,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:31,782 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:31,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:31,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:31,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:49:31,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:49:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:49:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:49:31,839 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-23 19:49:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,028 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-23 19:49:32,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:49:32,028 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-23 19:49:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,029 INFO L225 Difference]: With dead ends: 132 [2018-09-23 19:49:32,030 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:49:32,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:49:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:49:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 19:49:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 19:49:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-23 19:49:32,035 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-23 19:49:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,035 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-23 19:49:32,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:49:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-23 19:49:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 19:49:32,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,036 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-23 19:49:32,036 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-23 19:49:32,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:32,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:32,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:32,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:32,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:49:32,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:49:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:49:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:32,874 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-23 19:49:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,592 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-23 19:49:33,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:49:33,593 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-23 19:49:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,594 INFO L225 Difference]: With dead ends: 134 [2018-09-23 19:49:33,594 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 19:49:33,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 19:49:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-23 19:49:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 19:49:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-23 19:49:33,598 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-23 19:49:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,599 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-23 19:49:33,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:49:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-23 19:49:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:49:33,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,600 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-23 19:49:33,600 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-23 19:49:33,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:35,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:35,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:35,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:49:35,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:35,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:49:35,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:49:35,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:49:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:35,602 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-23 19:49:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:36,474 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-23 19:49:36,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:49:36,475 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-23 19:49:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:36,475 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:49:36,476 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:49:36,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:49:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:49:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:49:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-23 19:49:36,478 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-23 19:49:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:36,479 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-23 19:49:36,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:49:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-23 19:49:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:49:36,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:36,479 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-23 19:49:36,480 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:36,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-23 19:49:36,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:36,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:36,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:36,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:37,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:37,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:37,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-23 19:49:37,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:37,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:37,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:49:37,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:49:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:49:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:49:37,453 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-23 19:49:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:37,583 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-23 19:49:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:49:37,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-23 19:49:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:37,585 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:49:37,585 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:49:37,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:49:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:49:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:49:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:49:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-23 19:49:37,591 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-23 19:49:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:37,591 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-23 19:49:37,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:49:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-23 19:49:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-23 19:49:37,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:37,592 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-23 19:49:37,592 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:37,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-23 19:49:37,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:37,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:37,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:37,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:38,343 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:38,420 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 19:49:38,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:38,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:40,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 19:49:40,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:49:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:49:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:49:40,074 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-23 19:49:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:43,867 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-23 19:49:43,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:49:43,867 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-23 19:49:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:43,868 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:49:43,868 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 19:49:43,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-23 19:49:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 19:49:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 19:49:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 19:49:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-23 19:49:43,873 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-23 19:49:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:43,873 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-23 19:49:43,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:49:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-23 19:49:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:49:43,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:43,874 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-23 19:49:43,874 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:43,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-23 19:49:43,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:43,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:44,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:49:44,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:49:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:49:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:49:44,724 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-23 19:49:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,801 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-23 19:49:44,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:49:44,801 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-23 19:49:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,803 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:49:44,803 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:49:44,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:49:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:49:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:49:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:49:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-23 19:49:44,807 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-23 19:49:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,808 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-23 19:49:44,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:49:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-23 19:49:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:49:44,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,808 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-23 19:49:44,808 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-23 19:49:44,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:44,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:45,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:45,881 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:45,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:45,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:45,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:49:45,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:49:45,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:49:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:49:45,923 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-23 19:49:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:46,015 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-23 19:49:46,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:49:46,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-23 19:49:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:46,016 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:49:46,016 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:49:46,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:49:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:49:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:49:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:49:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-23 19:49:46,019 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-23 19:49:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:46,020 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-23 19:49:46,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:49:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-23 19:49:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 19:49:46,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:46,021 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-23 19:49:46,021 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:46,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-23 19:49:46,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:46,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:46,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:46,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:46,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:49:46,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:49:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:49:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:49:47,000 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-23 19:49:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,280 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-23 19:49:47,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:49:47,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-23 19:49:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,281 INFO L225 Difference]: With dead ends: 144 [2018-09-23 19:49:47,281 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 19:49:47,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:49:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 19:49:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 19:49:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 19:49:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-23 19:49:47,287 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-23 19:49:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-23 19:49:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:49:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-23 19:49:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 19:49:47,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,288 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-23 19:49:47,288 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-23 19:49:47,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:48,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:48,168 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:48,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:49:48,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:48,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:48,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:49:48,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:49:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:49:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:48,292 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-23 19:49:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:48,420 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-23 19:49:48,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:49:48,421 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-23 19:49:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:48,422 INFO L225 Difference]: With dead ends: 146 [2018-09-23 19:49:48,422 INFO L226 Difference]: Without dead ends: 142 [2018-09-23 19:49:48,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-23 19:49:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-23 19:49:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-23 19:49:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-23 19:49:48,428 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-23 19:49:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:48,429 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-23 19:49:48,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:49:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-23 19:49:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:49:48,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:48,430 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-23 19:49:48,430 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:48,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-23 19:49:48,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:48,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:48,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:48,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:49,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:49,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-23 19:49:49,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:49,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:49,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:49:49,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:49:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:49:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:49,414 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-23 19:49:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:49,488 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-23 19:49:49,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:49:49,488 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-23 19:49:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:49,489 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:49:49,489 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:49:49,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:49:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:49:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:49:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-23 19:49:49,494 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-23 19:49:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:49,494 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-23 19:49:49,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:49:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-23 19:49:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:49:49,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:49,495 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-23 19:49:49,495 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:49,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-23 19:49:49,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:49,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:49,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:49,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:50,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:50,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:50,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-23 19:49:50,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:50,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:50,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:49:50,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:49:50,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:49:50,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:49:50,659 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-23 19:49:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:50,943 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-23 19:49:50,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:49:50,944 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-23 19:49:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:50,945 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:49:50,945 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:49:50,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:49:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:49:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:49:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:49:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-23 19:49:50,951 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-23 19:49:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:50,951 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-23 19:49:50,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:49:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-23 19:49:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 19:49:50,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:50,952 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-23 19:49:50,952 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:50,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-23 19:49:50,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:50,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:50,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:50,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:52,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:52,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:52,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:52,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:52,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 19:49:53,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:49:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:49:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:49:53,831 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-23 19:49:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,360 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-23 19:49:58,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:49:58,360 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-23 19:49:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,361 INFO L225 Difference]: With dead ends: 152 [2018-09-23 19:49:58,361 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:49:58,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-23 19:49:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:49:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-23 19:49:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 19:49:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-23 19:49:58,366 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-23 19:49:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,367 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-23 19:49:58,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:49:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-23 19:49:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:49:58,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,367 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-23 19:49:58,368 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-23 19:49:58,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:00,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:00,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:00,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:50:00,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:50:00,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:50:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:50:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:00,222 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-23 19:50:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,314 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-23 19:50:00,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:50:00,315 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-23 19:50:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,316 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:50:00,316 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:50:00,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:50:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:50:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:50:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-23 19:50:00,319 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-23 19:50:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,319 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-23 19:50:00,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:50:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-23 19:50:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:50:00,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,320 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-23 19:50:00,320 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-23 19:50:00,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:01,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:01,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:50:01,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:50:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:50:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:01,305 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-23 19:50:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,499 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-23 19:50:01,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:50:01,500 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-23 19:50:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,500 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:50:01,500 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:50:01,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:50:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:50:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:50:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-23 19:50:01,503 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-23 19:50:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,504 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-23 19:50:01,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:50:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-23 19:50:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-23 19:50:01,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,504 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-23 19:50:01,505 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-23 19:50:01,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:02,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:02,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-23 19:50:02,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 19:50:04,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:50:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:50:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:50:04,362 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-23 19:50:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,064 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-23 19:50:09,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:50:09,065 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-23 19:50:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,066 INFO L225 Difference]: With dead ends: 158 [2018-09-23 19:50:09,066 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 19:50:09,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-23 19:50:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 19:50:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-23 19:50:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 19:50:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-23 19:50:09,073 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-23 19:50:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-23 19:50:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:50:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-23 19:50:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:50:09,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:09,074 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-23 19:50:09,075 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:09,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-23 19:50:09,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:09,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:09,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:09,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:10,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:50:10,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:50:10,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:50:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:10,163 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-23 19:50:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:10,294 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-23 19:50:10,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:50:10,294 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-23 19:50:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:10,295 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:50:10,295 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:50:10,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:50:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:50:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:50:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-23 19:50:10,300 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-23 19:50:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:10,301 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-23 19:50:10,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:50:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-23 19:50:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:50:10,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:10,302 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-23 19:50:10,302 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:10,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-23 19:50:10,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:10,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:10,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:10,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:11,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:11,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:11,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:11,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:11,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:50:11,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:50:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:50:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:11,502 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-23 19:50:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:11,645 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-23 19:50:11,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:50:11,645 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-23 19:50:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:11,646 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:50:11,646 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:50:11,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:50:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:50:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:50:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-23 19:50:11,650 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-23 19:50:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:11,650 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-23 19:50:11,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:50:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-23 19:50:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 19:50:11,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,651 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-23 19:50:11,651 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-23 19:50:11,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:11,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:12,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:12,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:12,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:50:12,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:50:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:50:12,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:12,846 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-23 19:50:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,994 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-23 19:50:12,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:50:12,995 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-23 19:50:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,996 INFO L225 Difference]: With dead ends: 162 [2018-09-23 19:50:12,996 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:50:12,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:50:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-23 19:50:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 19:50:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-23 19:50:13,000 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-23 19:50:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,001 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-23 19:50:13,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:50:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-23 19:50:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 19:50:13,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,002 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-23 19:50:13,002 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-23 19:50:13,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:14,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:50:14,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:50:14,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:50:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:50:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:14,198 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-23 19:50:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,453 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-23 19:50:14,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:50:14,454 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-23 19:50:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,455 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:50:14,455 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 19:50:14,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 19:50:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-23 19:50:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 19:50:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-23 19:50:14,459 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-23 19:50:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,459 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-23 19:50:14,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:50:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-23 19:50:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:50:14,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,460 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-23 19:50:14,461 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-23 19:50:14,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:15,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:15,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-23 19:50:15,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 19:50:17,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:50:17,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:50:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:50:17,972 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-23 19:50:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:23,243 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-23 19:50:23,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:50:23,243 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-23 19:50:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:23,245 INFO L225 Difference]: With dead ends: 167 [2018-09-23 19:50:23,245 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:50:23,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-23 19:50:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:50:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:50:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:50:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-23 19:50:23,251 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-23 19:50:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:23,252 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-23 19:50:23,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:50:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-23 19:50:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 19:50:23,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:23,253 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-23 19:50:23,253 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:23,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-23 19:50:23,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:23,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:23,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:23,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:24,345 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:24,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:24,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:24,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:50:24,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:50:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:50:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:24,460 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-23 19:50:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,616 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-23 19:50:24,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:50:24,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-23 19:50:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,617 INFO L225 Difference]: With dead ends: 168 [2018-09-23 19:50:24,617 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 19:50:24,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 19:50:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 19:50:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 19:50:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-23 19:50:24,622 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-23 19:50:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,622 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-23 19:50:24,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:50:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-23 19:50:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 19:50:24,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,624 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-23 19:50:24,624 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-23 19:50:24,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:24,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:25,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:25,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:25,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:25,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:50:25,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:50:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:50:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:25,792 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-23 19:50:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,947 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-23 19:50:25,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:50:25,947 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-23 19:50:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,948 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:50:25,949 INFO L226 Difference]: Without dead ends: 166 [2018-09-23 19:50:25,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-23 19:50:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-23 19:50:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-23 19:50:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-23 19:50:25,954 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-23 19:50:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,954 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-23 19:50:25,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:50:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-23 19:50:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:50:25,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,955 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-23 19:50:25,956 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-23 19:50:25,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:25,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:27,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:27,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:50:27,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:27,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:50:27,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:50:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:50:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:27,503 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-23 19:50:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,593 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-23 19:50:27,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:50:27,594 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-23 19:50:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,595 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:50:27,595 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:50:27,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:50:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 19:50:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:50:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-23 19:50:27,599 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-23 19:50:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,600 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-23 19:50:27,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:50:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-23 19:50:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:50:27,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,601 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-23 19:50:27,601 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-23 19:50:27,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:27,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:28,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:28,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:50:28,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:50:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:50:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:50:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:50:28,955 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-23 19:50:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,260 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-23 19:50:29,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:50:29,260 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-23 19:50:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,261 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:50:29,261 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 19:50:29,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:50:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 19:50:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 19:50:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:50:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-23 19:50:29,265 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-23 19:50:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,265 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-23 19:50:29,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:50:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-23 19:50:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-23 19:50:29,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,266 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-23 19:50:29,267 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,267 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-23 19:50:29,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:30,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:30,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:30,552 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-23 19:50:30,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:30,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 19:50:33,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 19:50:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 19:50:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:50:33,134 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-23 19:50:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,999 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-23 19:50:38,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 19:50:38,999 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-23 19:50:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,000 INFO L225 Difference]: With dead ends: 176 [2018-09-23 19:50:39,000 INFO L226 Difference]: Without dead ends: 172 [2018-09-23 19:50:39,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-23 19:50:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-23 19:50:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-23 19:50:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-23 19:50:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-23 19:50:39,005 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-23 19:50:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,005 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-23 19:50:39,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 19:50:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-23 19:50:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:50:39,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,006 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-23 19:50:39,007 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-23 19:50:39,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:39,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:40,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:40,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:40,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:40,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:50:40,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:50:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:50:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:40,384 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-23 19:50:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:40,542 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-23 19:50:40,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:50:40,543 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-23 19:50:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:40,544 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:50:40,544 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:50:40,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:50:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:50:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:50:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-23 19:50:40,547 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-23 19:50:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:40,547 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-23 19:50:40,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:50:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-23 19:50:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:50:40,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:40,548 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-23 19:50:40,548 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:40,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-23 19:50:40,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:40,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:40,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:40,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:42,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:42,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:42,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-23 19:50:42,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:42,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:42,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:50:42,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:50:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:50:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:42,619 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-23 19:50:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:42,775 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-23 19:50:42,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:50:42,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-23 19:50:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:42,777 INFO L225 Difference]: With dead ends: 179 [2018-09-23 19:50:42,777 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:50:42,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:50:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 19:50:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:50:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-23 19:50:42,782 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-23 19:50:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:42,782 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-23 19:50:42,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:50:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-23 19:50:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 19:50:42,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:42,783 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-23 19:50:42,783 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:42,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-23 19:50:42,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:42,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:42,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:42,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:43,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:44,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:44,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:44,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:44,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:50:44,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:50:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:50:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:44,111 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-23 19:50:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:44,283 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-23 19:50:44,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:50:44,283 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-23 19:50:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:44,284 INFO L225 Difference]: With dead ends: 180 [2018-09-23 19:50:44,284 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 19:50:44,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 19:50:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-23 19:50:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-23 19:50:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-23 19:50:44,290 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-23 19:50:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:44,291 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-23 19:50:44,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:50:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-23 19:50:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 19:50:44,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:44,292 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-23 19:50:44,292 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:44,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-23 19:50:44,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:44,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:45,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:45,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:50:45,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:50:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:50:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:45,629 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-23 19:50:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,730 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-23 19:50:45,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:50:45,730 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-23 19:50:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,731 INFO L225 Difference]: With dead ends: 182 [2018-09-23 19:50:45,732 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 19:50:45,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 19:50:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-23 19:50:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-23 19:50:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-23 19:50:45,737 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-23 19:50:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,738 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-23 19:50:45,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:50:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-23 19:50:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:50:45,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,739 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-23 19:50:45,739 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-23 19:50:45,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:45,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:47,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:47,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:47,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:47,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-23 19:50:47,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:47,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:50,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-23 19:50:50,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-23 19:50:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-23 19:50:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 19:50:50,248 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-23 19:50:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:56,636 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-23 19:50:56,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-23 19:50:56,637 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-23 19:50:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:56,637 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:50:56,637 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 19:50:56,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-23 19:50:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 19:50:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 19:50:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:50:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-23 19:50:56,642 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-23 19:50:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:56,642 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-23 19:50:56,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-23 19:50:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-23 19:50:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-23 19:50:56,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:56,644 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-23 19:50:56,644 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:56,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-23 19:50:56,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:56,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:56,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:56,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:58,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:58,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:58,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:50:58,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:50:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:50:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:50:58,472 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-23 19:50:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:58,598 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-23 19:50:58,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:50:58,598 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-23 19:50:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:58,600 INFO L225 Difference]: With dead ends: 186 [2018-09-23 19:50:58,600 INFO L226 Difference]: Without dead ends: 182 [2018-09-23 19:50:58,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:50:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-23 19:50:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-23 19:50:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-23 19:50:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-23 19:50:58,604 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-23 19:50:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:58,604 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-23 19:50:58,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:50:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-23 19:50:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-23 19:50:58,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:58,605 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-23 19:50:58,605 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:58,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-23 19:50:58,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:58,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:58,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:58,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:59,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:59,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:59,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:00,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:00,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:00,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:51:00,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:51:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:51:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:00,071 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-23 19:51:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:00,281 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-23 19:51:00,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:51:00,282 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-23 19:51:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:00,283 INFO L225 Difference]: With dead ends: 188 [2018-09-23 19:51:00,283 INFO L226 Difference]: Without dead ends: 184 [2018-09-23 19:51:00,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-23 19:51:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-23 19:51:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 19:51:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-23 19:51:00,287 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-23 19:51:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,288 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-23 19:51:00,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:51:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-23 19:51:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:51:00,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,288 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-23 19:51:00,289 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-23 19:51:00,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:00,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:01,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:01,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:01,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-23 19:51:01,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:01,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:01,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:51:01,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:51:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:51:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:01,803 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-23 19:51:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:01,921 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-23 19:51:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:51:01,922 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-23 19:51:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:01,923 INFO L225 Difference]: With dead ends: 189 [2018-09-23 19:51:01,923 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 19:51:01,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 19:51:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 19:51:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 19:51:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-23 19:51:01,928 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-23 19:51:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:01,929 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-23 19:51:01,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:51:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-23 19:51:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:51:01,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:01,929 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-23 19:51:01,930 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:01,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-23 19:51:01,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:01,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:03,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:03,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:03,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-23 19:51:03,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:03,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:03,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:51:03,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:51:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:51:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:51:03,811 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-23 19:51:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:04,002 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-23 19:51:04,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:51:04,002 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-23 19:51:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:04,004 INFO L225 Difference]: With dead ends: 191 [2018-09-23 19:51:04,004 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:51:04,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:51:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:51:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:51:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:51:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-23 19:51:04,008 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-23 19:51:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:04,008 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-23 19:51:04,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:51:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-23 19:51:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-23 19:51:04,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:04,009 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-23 19:51:04,009 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:04,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-23 19:51:04,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:04,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:04,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:04,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:05,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:05,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:05,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-23 19:51:05,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:05,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:08,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-23 19:51:08,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-23 19:51:08,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-23 19:51:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 19:51:08,715 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-23 19:51:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:15,700 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-23 19:51:15,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-23 19:51:15,701 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-23 19:51:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:15,702 INFO L225 Difference]: With dead ends: 194 [2018-09-23 19:51:15,702 INFO L226 Difference]: Without dead ends: 190 [2018-09-23 19:51:15,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-23 19:51:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-23 19:51:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-23 19:51:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-23 19:51:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-23 19:51:15,708 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-23 19:51:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:15,708 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-23 19:51:15,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-23 19:51:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-23 19:51:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:51:15,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:15,709 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-23 19:51:15,709 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:15,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-23 19:51:15,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:15,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:15,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:15,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:17,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:17,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:17,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:51:17,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:51:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:51:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:51:17,317 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-23 19:51:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:17,523 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-23 19:51:17,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:51:17,523 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-23 19:51:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:17,524 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:51:17,524 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 19:51:17,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:51:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 19:51:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 19:51:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 19:51:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-23 19:51:17,530 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-23 19:51:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:17,530 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-23 19:51:17,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:51:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-23 19:51:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:51:17,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:17,532 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-23 19:51:17,532 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:17,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-23 19:51:17,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:17,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:17,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:17,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:19,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:19,357 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:19,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:19,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:19,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:19,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:51:19,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:51:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:51:19,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:19,467 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-23 19:51:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:19,652 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-23 19:51:19,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:51:19,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-23 19:51:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:19,654 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:51:19,654 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:51:19,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:51:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 19:51:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:51:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-23 19:51:19,660 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-23 19:51:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:19,660 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-23 19:51:19,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:51:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-23 19:51:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-23 19:51:19,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:19,661 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-23 19:51:19,661 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:19,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-23 19:51:19,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:19,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:21,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:21,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:21,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:21,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:21,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:21,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:51:21,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:51:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:51:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:21,235 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-23 19:51:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:21,415 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-23 19:51:21,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:51:21,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-23 19:51:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:21,416 INFO L225 Difference]: With dead ends: 198 [2018-09-23 19:51:21,416 INFO L226 Difference]: Without dead ends: 194 [2018-09-23 19:51:21,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-23 19:51:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-23 19:51:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 19:51:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-23 19:51:21,420 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-23 19:51:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:21,420 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-23 19:51:21,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:51:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-23 19:51:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-23 19:51:21,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:21,421 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-23 19:51:21,422 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:21,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-23 19:51:21,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:21,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:21,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:21,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:23,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:23,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:23,246 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-23 19:51:23,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:23,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:23,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:51:23,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:51:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:51:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:23,304 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-23 19:51:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:23,545 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-23 19:51:23,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:51:23,546 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-23 19:51:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:23,546 INFO L225 Difference]: With dead ends: 200 [2018-09-23 19:51:23,546 INFO L226 Difference]: Without dead ends: 196 [2018-09-23 19:51:23,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-23 19:51:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-23 19:51:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-23 19:51:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-23 19:51:23,551 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-23 19:51:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,552 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-23 19:51:23,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:51:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-23 19:51:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:51:23,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,553 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-23 19:51:23,553 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-23 19:51:23,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:23,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:25,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:25,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-23 19:51:25,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:25,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:28,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-23 19:51:28,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-23 19:51:28,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-23 19:51:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 19:51:28,338 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-23 19:51:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:36,139 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-23 19:51:36,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-23 19:51:36,139 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-23 19:51:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:36,140 INFO L225 Difference]: With dead ends: 203 [2018-09-23 19:51:36,140 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 19:51:36,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-23 19:51:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 19:51:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 19:51:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:51:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-23 19:51:36,145 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-23 19:51:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:36,146 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-23 19:51:36,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-23 19:51:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-23 19:51:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-23 19:51:36,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:36,147 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-23 19:51:36,147 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:36,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-23 19:51:36,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:36,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:36,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:36,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:37,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:37,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:37,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:37,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:37,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:37,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:51:37,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:51:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:51:37,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:37,885 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-23 19:51:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:38,017 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-23 19:51:38,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:51:38,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-23 19:51:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:38,019 INFO L225 Difference]: With dead ends: 204 [2018-09-23 19:51:38,019 INFO L226 Difference]: Without dead ends: 200 [2018-09-23 19:51:38,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-23 19:51:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-23 19:51:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-23 19:51:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-23 19:51:38,024 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-23 19:51:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:38,025 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-23 19:51:38,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:51:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-23 19:51:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-23 19:51:38,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:38,026 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-23 19:51:38,026 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:38,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:38,026 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-23 19:51:38,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:38,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:38,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:38,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:38,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:39,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:39,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:40,039 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-23 19:51:40,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:40,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:40,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:40,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:51:40,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:51:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:51:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:40,097 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-23 19:51:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:40,284 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-23 19:51:40,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:51:40,285 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-23 19:51:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:40,286 INFO L225 Difference]: With dead ends: 206 [2018-09-23 19:51:40,286 INFO L226 Difference]: Without dead ends: 202 [2018-09-23 19:51:40,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-23 19:51:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-23 19:51:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-23 19:51:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-23 19:51:40,291 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-23 19:51:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:40,291 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-23 19:51:40,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:51:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-23 19:51:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 19:51:40,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:40,292 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-23 19:51:40,292 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:40,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-23 19:51:40,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:40,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:40,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:40,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:40,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:41,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:41,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:42,103 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-23 19:51:42,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:42,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:42,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:51:42,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:51:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:51:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:42,161 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-23 19:51:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:42,343 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-23 19:51:42,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:51:42,343 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-23 19:51:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:42,344 INFO L225 Difference]: With dead ends: 207 [2018-09-23 19:51:42,344 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:51:42,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:51:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 19:51:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 19:51:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-23 19:51:42,348 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-23 19:51:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:42,348 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-23 19:51:42,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:51:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-23 19:51:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 19:51:42,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:42,349 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-23 19:51:42,350 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:42,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-23 19:51:42,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:42,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:42,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:42,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:44,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:44,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:44,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:44,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:51:44,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:51:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:51:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:44,333 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-23 19:51:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:44,501 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-23 19:51:44,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:51:44,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-23 19:51:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:44,502 INFO L225 Difference]: With dead ends: 209 [2018-09-23 19:51:44,502 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 19:51:44,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 19:51:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 19:51:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 19:51:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-23 19:51:44,507 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-23 19:51:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:44,507 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-23 19:51:44,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:51:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-23 19:51:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 19:51:44,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:44,508 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-23 19:51:44,508 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:44,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:44,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-23 19:51:44,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:44,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:44,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:44,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:46,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:46,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:46,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:46,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-23 19:51:46,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:46,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:49,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:49,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-23 19:51:49,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-23 19:51:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-23 19:51:49,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 19:51:49,916 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-23 19:51:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:58,180 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-23 19:51:58,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-23 19:51:58,180 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-23 19:51:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:58,181 INFO L225 Difference]: With dead ends: 212 [2018-09-23 19:51:58,181 INFO L226 Difference]: Without dead ends: 208 [2018-09-23 19:51:58,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-23 19:51:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-23 19:51:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-23 19:51:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-23 19:51:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-23 19:51:58,188 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-23 19:51:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:58,188 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-23 19:51:58,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-23 19:51:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-23 19:51:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 19:51:58,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:58,189 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-23 19:51:58,189 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:58,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-23 19:51:58,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:58,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:58,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:58,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:00,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:00,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:00,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:00,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:00,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:00,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:52:00,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:52:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:52:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:52:00,291 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-23 19:52:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:00,420 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-23 19:52:00,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:52:00,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-23 19:52:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:00,422 INFO L225 Difference]: With dead ends: 213 [2018-09-23 19:52:00,422 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 19:52:00,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:52:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 19:52:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-23 19:52:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 19:52:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-23 19:52:00,427 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-23 19:52:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:00,427 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-23 19:52:00,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:52:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-23 19:52:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 19:52:00,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:00,428 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-23 19:52:00,428 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:00,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-23 19:52:00,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:00,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:00,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:00,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:00,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:02,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:02,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:02,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:02,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:02,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:02,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:02,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:02,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:52:02,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:52:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:52:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:52:02,328 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-23 19:52:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:02,528 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-23 19:52:02,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:52:02,528 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-23 19:52:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:02,529 INFO L225 Difference]: With dead ends: 215 [2018-09-23 19:52:02,529 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 19:52:02,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:52:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 19:52:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 19:52:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 19:52:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-23 19:52:02,535 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-23 19:52:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:02,535 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-23 19:52:02,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:52:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-23 19:52:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-23 19:52:02,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:02,537 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-23 19:52:02,537 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:02,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-23 19:52:02,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:02,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:02,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:02,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:02,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:04,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:04,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:04,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:04,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:04,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:04,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:52:04,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:52:04,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:52:04,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:52:04,846 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-23 19:52:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:05,070 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-23 19:52:05,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:52:05,071 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-23 19:52:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:05,071 INFO L225 Difference]: With dead ends: 216 [2018-09-23 19:52:05,072 INFO L226 Difference]: Without dead ends: 212 [2018-09-23 19:52:05,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:52:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-23 19:52:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-23 19:52:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-23 19:52:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-23 19:52:05,075 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-23 19:52:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:05,075 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-23 19:52:05,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:52:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-23 19:52:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-23 19:52:05,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:05,076 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-23 19:52:05,076 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:05,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-23 19:52:05,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:05,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:05,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:05,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:52:06,759 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:52:06,764 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:52:06,764 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:52:06 BoogieIcfgContainer [2018-09-23 19:52:06,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:52:06,765 INFO L168 Benchmark]: Toolchain (without parser) took 232489.59 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 207.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 387.6 MB). Peak memory consumption was 595.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:06,767 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:52:06,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:52:06,767 INFO L168 Benchmark]: Boogie Preprocessor took 28.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:52:06,767 INFO L168 Benchmark]: RCFGBuilder took 294.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:06,768 INFO L168 Benchmark]: TraceAbstraction took 232114.40 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 207.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 366.5 MB). Peak memory consumption was 574.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:06,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 294.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232114.40 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 207.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 366.5 MB). Peak memory consumption was 574.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 210 with TraceHistMax 69, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 68 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 232.0s OverallTime, 115 OverallIterations, 69 TraceHistogramMax, 90.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 661 SDtfs, 2417 SDslu, 11048 SDs, 0 SdLazy, 12640 SolverSat, 1109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17635 GetRequests, 11173 SyntacticMatches, 0 SemanticMatches, 6462 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 192.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 114 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 126.3s InterpolantComputationTime, 24119 NumberOfCodeBlocks, 24119 NumberOfCodeBlocksAsserted, 2176 NumberOfCheckSat, 23893 ConstructedInterpolants, 0 QuantifiedInterpolants, 9978263 SizeOfPredicates, 0 NumberOfNonLiveVariables, 28616 ConjunctsInSsa, 4124 ConjunctsInUnsatCore, 226 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/543827 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-52-06-778.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-52-06-778.csv Completed graceful shutdown