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/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:13:24,011 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:13:24,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:13:24,031 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:13:24,031 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:13:24,033 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:13:24,035 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:13:24,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:13:24,039 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:13:24,040 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:13:24,042 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 09:13:24,084 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 [2018-10-03 09:13:24,107 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:13:24,107 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:13:24,108 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:13:24,108 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:13:24,109 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:13:24,109 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:13:24,109 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:13:24,110 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:13:24,110 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:13:24,110 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:13:24,110 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:13:24,110 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:13:24,111 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:13:24,111 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:13:24,111 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:13:24,111 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:13:24,111 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:13:24,112 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:13:24,113 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:13:24,113 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:13:24,113 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:13:24,113 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:13:24,114 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:13:24,114 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:13:24,114 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:13:24,114 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:13:24,114 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:13:24,115 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:13:24,115 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:13:24,115 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:13:24,115 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:13:24,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:13:24,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:13:24,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:13:24,202 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:13:24,203 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:13:24,203 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-10-03 09:13:24,204 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-10-03 09:13:24,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:13:24,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:13:24,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:13:24,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:13:24,256 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:13:24,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:13:24,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:13:24,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:13:24,297 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:13:24,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/1) ... [2018-10-03 09:13:24,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:13:24,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:13:24,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:13:24,318 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:13:24,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (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 [2018-10-03 09:13:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 09:13:24,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 09:13:24,658 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 09:13:24,658 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:13:24 BoogieIcfgContainer [2018-10-03 09:13:24,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:13:24,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:13:24,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:13:24,663 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:13:24,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:13:24" (1/2) ... [2018-10-03 09:13:24,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320e3872 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:13:24, skipping insertion in model container [2018-10-03 09:13:24,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:13:24" (2/2) ... [2018-10-03 09:13:24,666 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-10-03 09:13:24,677 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:13:24,685 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:13:24,736 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:13:24,737 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:13:24,737 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:13:24,738 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:13:24,738 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:13:24,738 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:13:24,738 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:13:24,738 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:13:24,738 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:13:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 09:13:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 09:13:24,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:24,762 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 09:13:24,767 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:24,774 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-03 09:13:24,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:24,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:13:24,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:13:24,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 09:13:24,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:13:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:13:24,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:24,976 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 09:13:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:25,044 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-03 09:13:25,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:13:25,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 09:13:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:25,059 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:13:25,059 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:13:25,062 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 [2018-10-03 09:13:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:13:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-03 09:13:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:13:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-03 09:13:25,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-03 09:13:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:25,101 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-03 09:13:25,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:13:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-03 09:13:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:13:25,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:25,102 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 09:13:25,102 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:25,103 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-03 09:13:25,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:25,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:25,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:25,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:13:25,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:13:25,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:13:25,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:13:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:13:25,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:25,180 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-03 09:13:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:25,216 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-03 09:13:25,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:13:25,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-03 09:13:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:25,218 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:13:25,218 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:13:25,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:13:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:13:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:13:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:13:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 09:13:25,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-03 09:13:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:25,224 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 09:13:25,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:13:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 09:13:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:13:25,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:25,225 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 09:13:25,225 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:25,225 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-03 09:13:25,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:25,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:25,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:25,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:13:25,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:25,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:25,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:25,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:13:25,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:25,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-03 09:13:25,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:13:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:13:25,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:25,612 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-03 09:13:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:25,876 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-10-03 09:13:25,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:13:25,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-03 09:13:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:25,881 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:13:25,881 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:13:25,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 6 [2018-10-03 09:13:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:13:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-10-03 09:13:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:13:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-03 09:13:25,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-10-03 09:13:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:25,890 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-03 09:13:25,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:13:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-03 09:13:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:13:25,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:25,892 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-10-03 09:13:25,892 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:25,892 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-10-03 09:13:25,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:25,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:25,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:25,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-03 09:13:26,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:26,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:26,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:13:26,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:13:26,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:26,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-03 09:13:26,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:26,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-03 09:13:26,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:13:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:13:26,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:26,352 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-10-03 09:13:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:26,849 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-03 09:13:26,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:13:26,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-03 09:13:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:26,852 INFO L225 Difference]: With dead ends: 55 [2018-10-03 09:13:26,852 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:13:26,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 11 [2018-10-03 09:13:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:13:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-10-03 09:13:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:13:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-03 09:13:26,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-10-03 09:13:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:26,863 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-03 09:13:26,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:13:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-03 09:13:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:13:26,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:26,865 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-10-03 09:13:26,865 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:26,866 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:26,866 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-10-03 09:13:26,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:26,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:26,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-03 09:13:27,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:27,308 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 [2018-10-03 09:13:27,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:13:27,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 09:13:27,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:27,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-03 09:13:27,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:27,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:13:27,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:13:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:13:27,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:27,494 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-10-03 09:13:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:27,592 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-10-03 09:13:27,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:13:27,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-10-03 09:13:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:27,596 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:13:27,598 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 09:13:27,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 4 [2018-10-03 09:13:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 09:13:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 09:13:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 09:13:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-03 09:13:27,614 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-03 09:13:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:27,615 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-03 09:13:27,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:13:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-03 09:13:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 09:13:27,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:27,617 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-03 09:13:27,617 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:27,618 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:27,618 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-03 09:13:27,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:27,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:27,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:27,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:27,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-03 09:13:27,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:27,864 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 [2018-10-03 09:13:27,878 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:13:27,915 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:13:27,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:27,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-03 09:13:28,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:28,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-10-03 09:13:28,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:13:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:13:28,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:28,231 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-10-03 09:13:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:28,444 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-03 09:13:28,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:13:28,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-10-03 09:13:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:28,446 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:13:28,446 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:13:28,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-03 09:13:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:13:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-10-03 09:13:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 09:13:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-03 09:13:28,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-10-03 09:13:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:28,461 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-03 09:13:28,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:13:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-03 09:13:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 09:13:28,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:28,463 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-10-03 09:13:28,464 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:28,464 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-10-03 09:13:28,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:28,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:28,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:28,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:28,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-03 09:13:28,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:28,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:28,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:13:28,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 09:13:28,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:28,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-03 09:13:28,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:28,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-10-03 09:13:28,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:13:28,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:13:28,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:28,842 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-10-03 09:13:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:30,023 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-10-03 09:13:30,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:13:30,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-03 09:13:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:30,025 INFO L225 Difference]: With dead ends: 127 [2018-10-03 09:13:30,025 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 09:13:30,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 29 [2018-10-03 09:13:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 09:13:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-10-03 09:13:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 09:13:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-10-03 09:13:30,044 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-10-03 09:13:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:30,044 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-10-03 09:13:30,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:13:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-10-03 09:13:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 09:13:30,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:30,047 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-10-03 09:13:30,047 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:30,047 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-10-03 09:13:30,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:30,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:30,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-03 09:13:30,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:30,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:30,472 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:13:30,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-03 09:13:30,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:30,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-03 09:13:30,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:30,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-03 09:13:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:13:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:13:30,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:30,717 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-10-03 09:13:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:32,911 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-10-03 09:13:32,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:13:32,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-03 09:13:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:32,914 INFO L225 Difference]: With dead ends: 175 [2018-10-03 09:13:32,915 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 09:13:32,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 41 [2018-10-03 09:13:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 09:13:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-10-03 09:13:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 09:13:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-10-03 09:13:32,935 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-10-03 09:13:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-10-03 09:13:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:13:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-10-03 09:13:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 09:13:32,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:32,938 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-10-03 09:13:32,938 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:32,939 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-10-03 09:13:32,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:32,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:32,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-03 09:13:33,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:33,141 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 [2018-10-03 09:13:33,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:33,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-03 09:13:33,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:33,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-10-03 09:13:33,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:13:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:13:33,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:33,650 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-10-03 09:13:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:33,971 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-03 09:13:33,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:13:33,972 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-03 09:13:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:33,973 INFO L225 Difference]: With dead ends: 133 [2018-10-03 09:13:33,973 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 09:13:33,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 12 [2018-10-03 09:13:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 09:13:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-10-03 09:13:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 09:13:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-03 09:13:33,999 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-10-03 09:13:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:34,000 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-03 09:13:34,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:13:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-03 09:13:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:13:34,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:34,003 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-10-03 09:13:34,003 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:34,003 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-10-03 09:13:34,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:34,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:34,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:34,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:13:34,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-03 09:13:34,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:34,269 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 [2018-10-03 09:13:34,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:13:34,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:13:34,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:34,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-03 09:13:34,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:34,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:13:34,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:13:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:13:34,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:34,848 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-10-03 09:13:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:35,072 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-10-03 09:13:35,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:13:35,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-10-03 09:13:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:35,074 INFO L225 Difference]: With dead ends: 149 [2018-10-03 09:13:35,074 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 09:13:35,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.0s impTime 8 [2018-10-03 09:13:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 09:13:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-10-03 09:13:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 09:13:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-10-03 09:13:35,102 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-10-03 09:13:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:35,102 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-10-03 09:13:35,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:13:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-10-03 09:13:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 09:13:35,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:35,105 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-10-03 09:13:35,105 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:35,105 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-10-03 09:13:35,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:35,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:35,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:35,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:35,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-03 09:13:35,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:35,465 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 [2018-10-03 09:13:35,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:13:35,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 09:13:35,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:35,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-10-03 09:13:35,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:35,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-10-03 09:13:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:13:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:13:35,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:35,735 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-10-03 09:13:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:39,454 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-10-03 09:13:39,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 09:13:39,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-10-03 09:13:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:39,456 INFO L225 Difference]: With dead ends: 299 [2018-10-03 09:13:39,456 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 09:13:39,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 71 [2018-10-03 09:13:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 09:13:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-10-03 09:13:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 09:13:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-10-03 09:13:39,487 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-10-03 09:13:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:39,487 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-10-03 09:13:39,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:13:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-10-03 09:13:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 09:13:39,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:39,490 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-10-03 09:13:39,490 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:39,491 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-10-03 09:13:39,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:39,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:39,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:39,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:39,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-03 09:13:39,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:39,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:39,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:13:39,901 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:13:39,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:39,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-10-03 09:13:40,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:40,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-10-03 09:13:40,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:13:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:13:40,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:40,189 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-10-03 09:13:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:43,508 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-03 09:13:43,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 09:13:43,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-10-03 09:13:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:43,511 INFO L225 Difference]: With dead ends: 371 [2018-10-03 09:13:43,511 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 09:13:43,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 89 [2018-10-03 09:13:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 09:13:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-10-03 09:13:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 09:13:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-10-03 09:13:43,544 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-10-03 09:13:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:43,545 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-10-03 09:13:43,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:13:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-10-03 09:13:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-03 09:13:43,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:43,548 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-10-03 09:13:43,548 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:43,548 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-10-03 09:13:43,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:43,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:43,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:43,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:43,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-03 09:13:43,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:43,913 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 [2018-10-03 09:13:43,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:13:44,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 09:13:44,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:44,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-03 09:13:44,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:44,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-10-03 09:13:44,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:13:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:13:44,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:44,417 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-10-03 09:13:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:47,891 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-10-03 09:13:47,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-03 09:13:47,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-10-03 09:13:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:47,893 INFO L225 Difference]: With dead ends: 451 [2018-10-03 09:13:47,893 INFO L226 Difference]: Without dead ends: 267 [2018-10-03 09:13:47,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 109 [2018-10-03 09:13:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-03 09:13:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-10-03 09:13:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-03 09:13:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-10-03 09:13:47,931 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-10-03 09:13:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:47,931 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-10-03 09:13:47,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:13:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-10-03 09:13:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-03 09:13:47,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:47,935 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-10-03 09:13:47,935 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:47,935 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-10-03 09:13:47,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:47,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:47,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:13:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-03 09:13:48,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:13:48,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:13:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:13:53,207 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-03 09:13:53,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:13:53,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:13:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-10-03 09:13:53,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:13:53,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-10-03 09:13:53,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:13:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:13:53,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:13:53,505 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-10-03 09:13:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:13:59,907 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-10-03 09:13:59,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-03 09:13:59,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-10-03 09:13:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:13:59,909 INFO L225 Difference]: With dead ends: 539 [2018-10-03 09:13:59,909 INFO L226 Difference]: Without dead ends: 315 [2018-10-03 09:13:59,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 131 [2018-10-03 09:13:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-03 09:13:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-10-03 09:13:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-03 09:13:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-10-03 09:13:59,951 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-10-03 09:13:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:13:59,951 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-10-03 09:13:59,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:13:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-10-03 09:13:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-03 09:13:59,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:13:59,957 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-10-03 09:13:59,957 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:13:59,957 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:13:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-10-03 09:13:59,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:13:59,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:13:59,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:59,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:13:59,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:13:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:14:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-03 09:14:01,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:14:01,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:14:01,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:14:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:14:01,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:14:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-03 09:14:01,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:14:01,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 09:14:01,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:14:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:14:01,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:14:01,832 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-10-03 09:14:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:14:02,179 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-10-03 09:14:02,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:14:02,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-10-03 09:14:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:14:02,183 INFO L225 Difference]: With dead ends: 341 [2018-10-03 09:14:02,183 INFO L226 Difference]: Without dead ends: 339 [2018-10-03 09:14:02,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 13 [2018-10-03 09:14:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-03 09:14:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-10-03 09:14:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-03 09:14:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-10-03 09:14:02,224 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-10-03 09:14:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:14:02,225 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-10-03 09:14:02,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:14:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-10-03 09:14:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-03 09:14:02,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:14:02,227 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-10-03 09:14:02,227 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:14:02,228 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:14:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-10-03 09:14:02,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:14:02,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:14:02,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:14:02,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:14:02,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:14:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:14:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-03 09:14:02,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:14:02,980 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 [2018-10-03 09:14:02,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:14:03,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:14:03,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:14:03,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:14:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-03 09:14:03,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:14:03,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:14:03,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:14:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:14:03,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:14:03,971 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-10-03 09:14:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:14:04,314 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-10-03 09:14:04,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:14:04,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-10-03 09:14:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:14:04,316 INFO L225 Difference]: With dead ends: 365 [2018-10-03 09:14:04,316 INFO L226 Difference]: Without dead ends: 363 [2018-10-03 09:14:04,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.3s impTime 14 [2018-10-03 09:14:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-03 09:14:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-10-03 09:14:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-03 09:14:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-10-03 09:14:04,363 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-10-03 09:14:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:14:04,363 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-10-03 09:14:04,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:14:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-10-03 09:14:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-03 09:14:04,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:14:04,366 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-10-03 09:14:04,366 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:14:04,366 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:14:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-10-03 09:14:04,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:14:04,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:14:04,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:14:04,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:14:04,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:14:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:14:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-03 09:14:04,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:14:04,850 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 [2018-10-03 09:14:04,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown