java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:18:38,056 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:18:38,058 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:18:38,070 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:18:38,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:18:38,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:18:38,073 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:18:38,075 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:18:38,076 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:18:38,077 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:18:38,078 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:18:38,103 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:18:38,118 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:18:38,119 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:18:38,120 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:18:38,120 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:18:38,120 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:18:38,121 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:18:38,121 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:18:38,121 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:18:38,121 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:18:38,121 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:18:38,122 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:18:38,122 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:18:38,122 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:18:38,122 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:18:38,122 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:18:38,123 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:18:38,123 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:18:38,123 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:18:38,123 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:18:38,123 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:18:38,124 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:18:38,124 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:18:38,124 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:18:38,124 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:18:38,124 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:18:38,125 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:18:38,125 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:18:38,125 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:18:38,125 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:18:38,125 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:18:38,199 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:18:38,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:18:38,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:18:38,217 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:18:38,218 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:18:38,219 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-09-30 20:18:38,219 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-09-30 20:18:38,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:18:38,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:18:38,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:18:38,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:18:38,278 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:18:38,300 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 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,312 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 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:18:38,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:18:38,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:18:38,321 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:18:38,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... [2018-09-30 20:18:38,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:18:38,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:18:38,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:18:38,343 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:18:38,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:18:38,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:18:38,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:18:38,671 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:18:38,672 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:18:38 BoogieIcfgContainer [2018-09-30 20:18:38,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:18:38,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:18:38,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:18:38,677 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:18:38,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:38" (1/2) ... [2018-09-30 20:18:38,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c19d3d6 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:18:38, skipping insertion in model container [2018-09-30 20:18:38,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:18:38" (2/2) ... [2018-09-30 20:18:38,681 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-09-30 20:18:38,691 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:18:38,701 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:18:38,749 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:18:38,750 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:18:38,750 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:18:38,750 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:18:38,751 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:18:38,751 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:18:38,751 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:18:38,751 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:18:38,751 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:18:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:18:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:18:38,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:38,771 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:18:38,772 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:38,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:18:38,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:38,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:38,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:38,965 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:18:38,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:18:38,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:18:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:18:38,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:38,985 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:18:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:39,046 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 20:18:39,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:18:39,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:18:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:39,059 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:18:39,059 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:18:39,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:18:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-30 20:18:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:18:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:18:39,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-30 20:18:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:39,104 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:18:39,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:18:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:18:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:18:39,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:39,105 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:18:39,105 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:39,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-30 20:18:39,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:39,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:39,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:39,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:39,202 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:18:39,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:18:39,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:18:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:18:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:39,206 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-09-30 20:18:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:39,271 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-30 20:18:39,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:18:39,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-30 20:18:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:39,272 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:18:39,273 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:18:39,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:18:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:18:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:18:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:18:39,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 20:18:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:39,278 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:18:39,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:18:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:18:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:18:39,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:39,280 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:18:39,280 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:39,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-30 20:18:39,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:39,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:39,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:39,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:39,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:39,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:39,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:39,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:39,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:39,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-30 20:18:39,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:18:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:18:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:18:39,863 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-30 20:18:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:40,405 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-09-30 20:18:40,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:18:40,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 20:18:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:40,407 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:18:40,408 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:18:40,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:18:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-09-30 20:18:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:18:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 20:18:40,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-09-30 20:18:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:40,422 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 20:18:40,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:18:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 20:18:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:18:40,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:40,424 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-09-30 20:18:40,425 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:40,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-09-30 20:18:40,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:40,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:40,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:40,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-30 20:18:40,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:40,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:40,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:40,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:40,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:40,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-30 20:18:40,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:40,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 20:18:40,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:18:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:18:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:18:40,703 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-09-30 20:18:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:41,371 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-30 20:18:41,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:18:41,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 20:18:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:41,373 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:18:41,373 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:18:41,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:18:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:18:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-09-30 20:18:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:18:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-09-30 20:18:41,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-09-30 20:18:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:41,393 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-09-30 20:18:41,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:18:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-09-30 20:18:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:18:41,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:41,395 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-09-30 20:18:41,395 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:41,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-09-30 20:18:41,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:41,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:41,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:41,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-30 20:18:41,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:41,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:41,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:41,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:18:41,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:41,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-30 20:18:41,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:41,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:18:41,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:18:41,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:18:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:18:41,670 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-09-30 20:18:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:41,731 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-09-30 20:18:41,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:18:41,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-09-30 20:18:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:41,733 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:18:41,733 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:18:41,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:18:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:18:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:18:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:18:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-30 20:18:41,753 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-09-30 20:18:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:41,753 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-30 20:18:41,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:18:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-30 20:18:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:18:41,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:41,755 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-30 20:18:41,755 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:41,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-30 20:18:41,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:41,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-09-30 20:18:42,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:42,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:42,051 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:18:42,085 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:18:42,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:42,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-30 20:18:42,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:42,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-09-30 20:18:42,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:18:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:18:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:42,307 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-09-30 20:18:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:42,527 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-09-30 20:18:42,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:18:42,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-09-30 20:18:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:42,530 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:18:42,530 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:18:42,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:18:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-09-30 20:18:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:18:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-30 20:18:42,544 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-09-30 20:18:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:42,544 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-30 20:18:42,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:18:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-30 20:18:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:18:42,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:42,547 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-09-30 20:18:42,547 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:42,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:42,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-09-30 20:18:42,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:42,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:42,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:42,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:42,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-30 20:18:42,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:42,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:42,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:42,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:18:42,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:42,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-09-30 20:18:42,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:42,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 20:18:42,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:18:42,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:18:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:18:42,928 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-09-30 20:18:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:44,100 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-09-30 20:18:44,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:18:44,101 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-09-30 20:18:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:44,102 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:18:44,103 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:18:44,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:18:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:18:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-09-30 20:18:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:18:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-09-30 20:18:44,121 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-09-30 20:18:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:44,121 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-09-30 20:18:44,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:18:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-09-30 20:18:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:18:44,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:44,124 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-09-30 20:18:44,125 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:44,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-09-30 20:18:44,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:44,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:44,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:44,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-30 20:18:44,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:44,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:44,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:18:44,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 20:18:44,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:44,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-09-30 20:18:44,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:44,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:18:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:18:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:18:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:18:44,828 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-09-30 20:18:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:46,408 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-09-30 20:18:46,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:18:46,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-09-30 20:18:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:46,413 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:18:46,413 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:18:46,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:18:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:18:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-09-30 20:18:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:18:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-09-30 20:18:46,450 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-09-30 20:18:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:46,450 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-09-30 20:18:46,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:18:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-09-30 20:18:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:18:46,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:46,455 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-09-30 20:18:46,455 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:46,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-09-30 20:18:46,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:46,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-30 20:18:47,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:47,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:47,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:47,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-30 20:18:47,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:47,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-09-30 20:18:47,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:18:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:18:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:18:47,455 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-09-30 20:18:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:47,841 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-09-30 20:18:47,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:18:47,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-09-30 20:18:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:47,843 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:18:47,843 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:18:47,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:18:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:18:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-09-30 20:18:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:18:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-09-30 20:18:47,867 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-09-30 20:18:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:47,868 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-09-30 20:18:47,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:18:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-09-30 20:18:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:18:47,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:47,870 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-09-30 20:18:47,870 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:47,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-09-30 20:18:47,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:47,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:47,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:47,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-30 20:18:48,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:48,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:48,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:48,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:48,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:48,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-30 20:18:48,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:48,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:18:48,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:18:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:18:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:48,415 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-09-30 20:18:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:48,825 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-09-30 20:18:48,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:18:48,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-09-30 20:18:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:48,827 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:18:48,827 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:18:48,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:18:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-09-30 20:18:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:18:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-09-30 20:18:48,851 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-09-30 20:18:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:48,851 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-09-30 20:18:48,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:18:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-09-30 20:18:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:18:48,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:48,854 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-09-30 20:18:48,854 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:48,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-09-30 20:18:48,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:48,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:48,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:48,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-09-30 20:18:49,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:49,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:49,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:49,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:18:49,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:49,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-09-30 20:18:49,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:49,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 20:18:49,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:18:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:18:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:18:49,555 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-09-30 20:18:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:52,491 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-09-30 20:18:52,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:18:52,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-09-30 20:18:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:52,492 INFO L225 Difference]: With dead ends: 299 [2018-09-30 20:18:52,492 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:18:52,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=285, Invalid=6195, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:18:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:18:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-09-30 20:18:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:18:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-09-30 20:18:52,521 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-09-30 20:18:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:52,521 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-09-30 20:18:52,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:18:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-09-30 20:18:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 20:18:52,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:52,524 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-09-30 20:18:52,524 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:52,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-09-30 20:18:52,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:52,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:52,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:52,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:52,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-09-30 20:18:52,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:52,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:52,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:18:52,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:18:52,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:52,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-09-30 20:18:53,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:53,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 20:18:53,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:18:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:18:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:18:53,072 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-09-30 20:18:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:55,577 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-09-30 20:18:55,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:18:55,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-09-30 20:18:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:55,579 INFO L225 Difference]: With dead ends: 371 [2018-09-30 20:18:55,579 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 20:18:55,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=357, Invalid=9543, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:18:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 20:18:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-09-30 20:18:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 20:18:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-09-30 20:18:55,609 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-09-30 20:18:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:55,609 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-09-30 20:18:55,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:18:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-09-30 20:18:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 20:18:55,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:55,611 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-09-30 20:18:55,612 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:55,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-09-30 20:18:55,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:55,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:55,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:55,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:55,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-09-30 20:18:56,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:56,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:56,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:56,243 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:18:56,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:56,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-09-30 20:18:56,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:56,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-09-30 20:18:56,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:18:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:18:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:18:56,496 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-09-30 20:19:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:00,505 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-09-30 20:19:00,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:19:00,505 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-09-30 20:19:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:00,507 INFO L225 Difference]: With dead ends: 451 [2018-09-30 20:19:00,507 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:19:00,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=437, Invalid=14083, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 20:19:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:19:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-09-30 20:19:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 20:19:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-09-30 20:19:00,545 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-09-30 20:19:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:00,545 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-09-30 20:19:00,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:19:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-09-30 20:19:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 20:19:00,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:19:00,549 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-09-30 20:19:00,549 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:19:00,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:19:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-09-30 20:19:00,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:19:00,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:19:00,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:00,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:19:00,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 20:19:01,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:19:01,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:19:01,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:19:06,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 20:19:06,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:19:06,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:19:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-09-30 20:19:06,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:19:06,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-30 20:19:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:19:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:19:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:19:06,784 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-09-30 20:19:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:11,269 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-09-30 20:19:11,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:19:11,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-09-30 20:19:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:11,271 INFO L225 Difference]: With dead ends: 539 [2018-09-30 20:19:11,271 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 20:19:11,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=525, Invalid=20067, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 20:19:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 20:19:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-09-30 20:19:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 20:19:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-09-30 20:19:11,312 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-09-30 20:19:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:11,312 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-09-30 20:19:11,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:19:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-09-30 20:19:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 20:19:11,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:19:11,315 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-09-30 20:19:11,315 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:19:11,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:19:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-09-30 20:19:11,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:19:11,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:19:11,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:11,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:19:11,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 20:19:12,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:19:12,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:19:12,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:19:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:12,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:19:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 20:19:12,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:19:12,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:19:12,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:19:12,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:19:12,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:19:12,308 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-09-30 20:19:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:12,677 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-09-30 20:19:12,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:19:12,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-09-30 20:19:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:12,680 INFO L225 Difference]: With dead ends: 341 [2018-09-30 20:19:12,680 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 20:19:12,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:19:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 20:19:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-09-30 20:19:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 20:19:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-09-30 20:19:12,724 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-09-30 20:19:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:12,724 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-09-30 20:19:12,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:19:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-09-30 20:19:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 20:19:12,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:19:12,727 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-09-30 20:19:12,727 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:19:12,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:19:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-09-30 20:19:12,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:19:12,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:19:12,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:12,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:19:12,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 20:19:13,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:19:13,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:19:13,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:19:13,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:19:13,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:19:13,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:19:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 20:19:13,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:19:13,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:19:13,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:19:13,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:19:13,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:19:13,922 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-09-30 20:19:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:14,274 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-09-30 20:19:14,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:19:14,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-09-30 20:19:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:14,277 INFO L225 Difference]: With dead ends: 365 [2018-09-30 20:19:14,277 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 20:19:14,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:19:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 20:19:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-09-30 20:19:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 20:19:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-09-30 20:19:14,327 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-09-30 20:19:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:14,328 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-09-30 20:19:14,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:19:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-09-30 20:19:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-30 20:19:14,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:19:14,330 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-09-30 20:19:14,330 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:19:14,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:19:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-09-30 20:19:14,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:19:14,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:19:14,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:14,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:19:14,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 20:19:15,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:19:15,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:19:15,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown