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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:45:39,062 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:45:39,064 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:45:39,076 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:45:39,076 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:45:39,077 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:45:39,079 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:45:39,080 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:45:39,084 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:45:39,085 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:45:39,088 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:45:39,088 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:45:39,089 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:45:39,090 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:45:39,094 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:45:39,095 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:45:39,096 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:45:39,098 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:45:39,100 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:45:39,101 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:45:39,102 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:45:39,103 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:45:39,105 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:45:39,120 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:45:39,149 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:45:39,150 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:45:39,152 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:45:39,152 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:45:39,153 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:45:39,154 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:45:39,154 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:45:39,154 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:45:39,155 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:45:39,155 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:45:39,155 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:45:39,155 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:45:39,156 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:45:39,157 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:45:39,157 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:45:39,157 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:45:39,157 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:45:39,157 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:45:39,158 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:45:39,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:45:39,159 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:45:39,159 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:45:39,160 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:45:39,160 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:45:39,160 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:45:39,160 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:45:39,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:45:39,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:45:39,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:45:39,229 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:45:39,230 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:45:39,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-10-04 09:45:39,231 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-10-04 09:45:39,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:45:39,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:45:39,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:45:39,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:45:39,295 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:45:39,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:45:39,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:45:39,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:45:39,340 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:45:39,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... [2018-10-04 09:45:39,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:45:39,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:45:39,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:45:39,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:45:39,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:45:39,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:45:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:45:39,709 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:45:39,710 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:45:39 BoogieIcfgContainer [2018-10-04 09:45:39,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:45:39,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:45:39,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:45:39,716 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:45:39,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:39" (1/2) ... [2018-10-04 09:45:39,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3792945e and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:45:39, skipping insertion in model container [2018-10-04 09:45:39,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:45:39" (2/2) ... [2018-10-04 09:45:39,720 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-10-04 09:45:39,731 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:45:39,741 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:45:39,786 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:45:39,787 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:45:39,788 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:45:39,788 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:45:39,788 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:45:39,788 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:45:39,788 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:45:39,789 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:45:39,789 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:45:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:45:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:45:39,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:39,810 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:45:39,811 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:39,822 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:45:39,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:39,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:39,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:39,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:39,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:45:39,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:45:39,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:45:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:45:39,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:39,993 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:45:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:40,086 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 09:45:40,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:45:40,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:45:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:40,123 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:45:40,123 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:45:40,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:45:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:45:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 09:45:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:45:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 09:45:40,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 09:45:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:40,205 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 09:45:40,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:45:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 09:45:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:45:40,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:40,206 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:45:40,206 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:40,207 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:40,207 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 09:45:40,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:40,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:40,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:40,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:40,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:45:40,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:45:40,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:45:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:45:40,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:40,294 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-04 09:45:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:40,347 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 09:45:40,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:45:40,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:45:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:40,349 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:45:40,349 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:45:40,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 09:45:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:45:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:45:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:45:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 09:45:40,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 09:45:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:40,357 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 09:45:40,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:45:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 09:45:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:45:40,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:40,359 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:45:40,359 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:40,360 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 09:45:40,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:40,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:40,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:40,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:40,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:40,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:40,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:40,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-04 09:45:40,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:45:40,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:45:40,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:40,628 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 09:45:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:40,731 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-04 09:45:40,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:45:40,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 09:45:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:40,733 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:45:40,733 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:45:40,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 09:45:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:45:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:45:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:45:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 09:45:40,738 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 09:45:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 09:45:40,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:45:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 09:45:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:45:40,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:40,740 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:45:40,740 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:40,740 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:40,740 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-10-04 09:45:40,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:40,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:40,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:40,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:40,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:40,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:45:40,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:45:40,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:45:40,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:40,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 09:45:41,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:41,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-10-04 09:45:41,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:45:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:45:41,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:41,252 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 09:45:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:41,763 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-04 09:45:41,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:45:41,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 09:45:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:41,766 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:45:41,766 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:45:41,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 9 [2018-10-04 09:45:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:45:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-10-04 09:45:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:45:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:45:41,776 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-10-04 09:45:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:41,776 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:45:41,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:45:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:45:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:45:41,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:41,778 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-10-04 09:45:41,778 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:41,778 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-10-04 09:45:41,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:41,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:41,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:41,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:41,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-04 09:45:41,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:41,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:41,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:45:41,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:45:41,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:41,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-04 09:45:42,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:42,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-04 09:45:42,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:45:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:45:42,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:42,518 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 09:45:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:42,935 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-10-04 09:45:42,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:45:42,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-04 09:45:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:42,937 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:45:42,937 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:45:42,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 11 [2018-10-04 09:45:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:45:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-10-04 09:45:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:45:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 09:45:42,950 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-10-04 09:45:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:42,951 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 09:45:42,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:45:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 09:45:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:45:42,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:42,954 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 09:45:42,954 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:42,955 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:42,955 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 09:45:42,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:42,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:42,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:42,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:42,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 09:45:43,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:43,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:43,186 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:45:43,217 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:45:43,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:43,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 09:45:43,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:43,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-04 09:45:43,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:45:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:45:43,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:43,373 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-10-04 09:45:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:43,461 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-10-04 09:45:43,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:45:43,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-10-04 09:45:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:43,464 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:45:43,464 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:45:43,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 09:45:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:45:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:45:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:45:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-04 09:45:43,483 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-10-04 09:45:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:43,483 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-04 09:45:43,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:45:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-04 09:45:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:45:43,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:43,490 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-10-04 09:45:43,490 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:43,490 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-10-04 09:45:43,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:43,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:43,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:43,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:43,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 09:45:43,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:43,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:43,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:45:43,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 09:45:43,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:43,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 09:45:43,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:43,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-04 09:45:43,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:45:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:45:43,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:43,983 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-10-04 09:45:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:44,021 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-10-04 09:45:44,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:45:44,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-10-04 09:45:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:44,029 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:45:44,029 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:45:44,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 8 [2018-10-04 09:45:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:45:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:45:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:45:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-04 09:45:44,045 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-10-04 09:45:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:44,046 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-04 09:45:44,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:45:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-04 09:45:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:45:44,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:44,048 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-10-04 09:45:44,048 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:44,048 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:44,048 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-10-04 09:45:44,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:44,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:44,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:44,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-04 09:45:44,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:44,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:44,278 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:45:44,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:45:44,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:44,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-04 09:45:44,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:44,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-10-04 09:45:44,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:45:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:45:44,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:44,748 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-10-04 09:45:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:46,302 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-10-04 09:45:46,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:45:46,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-04 09:45:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:46,304 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:45:46,304 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:45:46,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.1s impTime 15 [2018-10-04 09:45:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:45:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-10-04 09:45:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:45:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-10-04 09:45:46,324 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-10-04 09:45:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:46,325 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-10-04 09:45:46,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:45:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-10-04 09:45:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:45:46,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:46,327 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-10-04 09:45:46,328 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:46,328 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:46,328 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-10-04 09:45:46,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:46,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:46,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:46,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:46,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 09:45:46,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:46,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:46,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:46,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 09:45:47,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:47,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-04 09:45:47,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:45:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:45:47,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:47,235 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-10-04 09:45:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:47,336 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-10-04 09:45:47,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:45:47,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-10-04 09:45:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:47,344 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:45:47,344 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:45:47,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 10 [2018-10-04 09:45:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:45:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:45:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:45:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-10-04 09:45:47,373 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-10-04 09:45:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:47,374 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-10-04 09:45:47,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:45:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-10-04 09:45:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:45:47,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:47,378 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-10-04 09:45:47,379 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:47,379 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-10-04 09:45:47,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:47,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 09:45:47,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:47,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:47,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:45:47,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:45:47,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:47,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 09:45:47,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:47,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-10-04 09:45:47,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:45:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:45:47,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:47,843 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-10-04 09:45:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:47,921 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-10-04 09:45:47,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:45:47,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-10-04 09:45:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:47,924 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:45:47,924 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:45:47,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 09:45:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:45:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:45:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:45:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-10-04 09:45:47,942 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-10-04 09:45:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:47,943 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-10-04 09:45:47,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:45:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-10-04 09:45:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:45:47,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:47,945 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-10-04 09:45:47,945 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:47,945 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-10-04 09:45:47,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:47,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:47,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:47,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 09:45:48,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:48,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:48,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:45:48,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:45:48,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:48,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 09:45:48,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:48,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-04 09:45:48,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:45:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:45:48,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:48,941 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-10-04 09:45:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:49,170 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-10-04 09:45:49,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:45:49,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-10-04 09:45:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:49,172 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:45:49,172 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:45:49,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 12 [2018-10-04 09:45:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:45:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:45:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:45:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-10-04 09:45:49,198 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-10-04 09:45:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:49,199 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-10-04 09:45:49,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:45:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-10-04 09:45:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:45:49,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:49,200 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-10-04 09:45:49,201 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:49,201 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-10-04 09:45:49,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:49,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:49,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:49,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:49,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:45:49,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:49,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:49,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:45:49,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:45:49,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:49,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:45:49,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:49,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 09:45:49,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:45:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:45:49,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:49,706 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-10-04 09:45:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:49,818 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 09:45:49,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:45:49,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-10-04 09:45:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:49,821 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:45:49,821 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:45:49,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 7 [2018-10-04 09:45:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:45:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-10-04 09:45:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:45:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-10-04 09:45:49,845 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-10-04 09:45:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:49,846 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-10-04 09:45:49,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:45:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-10-04 09:45:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 09:45:49,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:49,848 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-10-04 09:45:49,848 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:49,848 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-10-04 09:45:49,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:49,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:49,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:49,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:49,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:45:50,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:50,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:50,056 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:45:50,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:45:50,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:50,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:45:50,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:50,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 09:45:50,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:45:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:45:50,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:50,541 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-10-04 09:45:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:50,602 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-10-04 09:45:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:45:50,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-10-04 09:45:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:50,604 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:45:50,604 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:45:50,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 8 [2018-10-04 09:45:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:45:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-10-04 09:45:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:45:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-10-04 09:45:50,632 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-10-04 09:45:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:50,632 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-10-04 09:45:50,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:45:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-10-04 09:45:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:45:50,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:50,634 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-10-04 09:45:50,634 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:50,634 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-10-04 09:45:50,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:50,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:50,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:50,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:50,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:45:51,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:51,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:51,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:45:51,137 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:45:51,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:51,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:45:51,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:51,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 09:45:51,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:45:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:45:51,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:51,712 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-10-04 09:45:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:51,858 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-10-04 09:45:51,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:45:51,860 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-10-04 09:45:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:51,862 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:45:51,862 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:45:51,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 9 [2018-10-04 09:45:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:45:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-10-04 09:45:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:45:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-10-04 09:45:51,888 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-10-04 09:45:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:51,888 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-10-04 09:45:51,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:45:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-10-04 09:45:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:45:51,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:51,891 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-10-04 09:45:51,891 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:51,891 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-10-04 09:45:51,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:51,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:51,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:51,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:51,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:45:52,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:52,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:52,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:52,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:45:53,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:53,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 09:45:53,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:45:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:45:53,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:53,046 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-10-04 09:45:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:53,183 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-10-04 09:45:53,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:45:53,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-10-04 09:45:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:53,188 INFO L225 Difference]: With dead ends: 221 [2018-10-04 09:45:53,188 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:45:53,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 10 [2018-10-04 09:45:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:45:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-10-04 09:45:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 09:45:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-10-04 09:45:53,232 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-10-04 09:45:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:53,234 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-10-04 09:45:53,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:45:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-10-04 09:45:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 09:45:53,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:53,236 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-10-04 09:45:53,236 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:53,236 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-10-04 09:45:53,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:53,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:53,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:45:53,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:53,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:53,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:45:54,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:45:54,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:54,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:45:54,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:54,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 09:45:54,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:45:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:45:54,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:54,615 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-10-04 09:45:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:54,774 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-10-04 09:45:54,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:45:54,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-10-04 09:45:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:54,776 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:45:54,776 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 09:45:54,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 11 [2018-10-04 09:45:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 09:45:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-10-04 09:45:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:45:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-10-04 09:45:54,822 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-10-04 09:45:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:54,823 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-10-04 09:45:54,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:45:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-10-04 09:45:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 09:45:54,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:54,825 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-10-04 09:45:54,825 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:54,825 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-10-04 09:45:54,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:54,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:54,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:54,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:54,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:45:55,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:55,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:55,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:45:55,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-10-04 09:45:55,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:55,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:45:55,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:55,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 09:45:55,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:45:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:45:55,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:55,833 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-10-04 09:45:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:56,215 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-10-04 09:45:56,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:45:56,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-10-04 09:45:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:56,218 INFO L225 Difference]: With dead ends: 269 [2018-10-04 09:45:56,218 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 09:45:56,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 12 [2018-10-04 09:45:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 09:45:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-10-04 09:45:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 09:45:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-10-04 09:45:56,278 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-10-04 09:45:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:56,279 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-10-04 09:45:56,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:45:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-10-04 09:45:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-04 09:45:56,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:56,281 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-10-04 09:45:56,281 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:56,281 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-10-04 09:45:56,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:56,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:56,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:56,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:56,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:57,177 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:45:57,408 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:45:57,695 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:45:57,896 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:46:00,441 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:46:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:46:00,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:46:00,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-04 09:46:00,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:46:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:46:00,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:00,865 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-10-04 09:46:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:04,199 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-10-04 09:46:04,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:46:04,200 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-10-04 09:46:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:04,200 INFO L225 Difference]: With dead ends: 10235 [2018-10-04 09:46:04,200 INFO L226 Difference]: Without dead ends: 0 [2018-10-04 09:46:04,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.5s impTime 23 [2018-10-04 09:46:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-04 09:46:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-04 09:46:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-04 09:46:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-04 09:46:04,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-10-04 09:46:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:04,215 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-04 09:46:04,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:46:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-04 09:46:04,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-04 09:46:04,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-04 09:46:10,904 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:10,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:10,918 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,081 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,237 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,338 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,370 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,558 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,619 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,843 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:11,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,247 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,408 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:12,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:13,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:13,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:13,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:13,908 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:14,007 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:14,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:14,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:14,600 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:15,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:15,581 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:15,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:16,048 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:16,202 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:16,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:17,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:17,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:17,738 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:17,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:18,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:18,725 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:18,833 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:19,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:19,416 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:19,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:19,574 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,604 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:20,891 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:22,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:22,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:22,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:23,291 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:23,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:24,317 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:24,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:27,198 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:29,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:29,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:29,889 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:29,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:32,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:34,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:34,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:35,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:36,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:38,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:40,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:43,059 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:45,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:49,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:49,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:46:57,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:20,954 WARN L178 SmtUtils]: Spent 1.28 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 09:47:26,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,458 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,462 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,530 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,573 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,796 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:26,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,139 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,170 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,377 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,699 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,819 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:27,918 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:28,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:28,210 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:28,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:28,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:29,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:29,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:29,622 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:30,090 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:30,573 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:30,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:31,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:31,287 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:31,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:32,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:32,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:32,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:33,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:33,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:33,922 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:34,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:34,507 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:34,684 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:34,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:34,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:35,459 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:35,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:35,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:35,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:35,988 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:36,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:36,224 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:37,485 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:37,495 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:37,836 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:38,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:38,980 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:39,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:40,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:42,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:44,346 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:44,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:45,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:45,033 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:48,099 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:49,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:49,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:50,243 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:51,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:53,542 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:55,479 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:47:58,165 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:48:00,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:48:04,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:48:04,558 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:48:11,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:48:34,381 WARN L178 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 09:48:35,179 WARN L178 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 09:48:36,028 WARN L178 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 09:49:52,518 WARN L178 SmtUtils]: Spent 1.27 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-10-04 09:49:53,127 WARN L186 SmtUtils]: Removed 2 from assertion stack [2018-10-04 09:49:53,127 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-04 09:49:53,128 INFO L168 Benchmark]: Toolchain (without parser) took 253835.73 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: -899.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 09:49:53,130 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 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. [2018-10-04 09:49:53,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.12 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. [2018-10-04 09:49:53,133 INFO L168 Benchmark]: Boogie Preprocessor took 25.31 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. [2018-10-04 09:49:53,133 INFO L168 Benchmark]: RCFGBuilder took 344.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:49:53,134 INFO L168 Benchmark]: TraceAbstraction took 253416.49 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: -920.1 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 09:49:53,139 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 0.28 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 45.12 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 25.31 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 344.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253416.49 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: -920.1 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1932. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-49-53-154.csv Completed graceful shutdown