java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:44:43,031 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:44:43,033 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:44:43,049 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:44:43,049 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:44:43,051 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:44:43,053 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:44:43,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:44:43,057 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:44:43,058 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:44:43,062 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:44:43,110 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:44:43,140 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:44:43,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:44:43,141 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:44:43,142 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:44:43,142 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:44:43,143 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:44:43,143 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:44:43,144 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:44:43,144 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:44:43,144 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:44:43,144 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:44:43,145 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:44:43,145 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:44:43,145 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:44:43,145 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:44:43,146 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:44:43,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:44:43,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:44:43,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:44:43,146 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:44:43,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:44:43,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:44:43,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:44:43,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:44:43,147 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:44:43,149 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:44:43,149 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:44:43,149 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:44:43,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:44:43,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:44:43,150 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:44:43,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:44:43,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:44:43,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:44:43,230 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:44:43,231 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:44:43,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-09-30 20:44:43,232 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-09-30 20:44:43,282 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:44:43,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:44:43,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:44:43,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:44:43,287 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:44:43,306 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,317 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:44:43,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:44:43,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:44:43,326 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:44:43,337 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,337 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,338 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,338 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,342 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,344 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,345 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 08:44:43" (1/1) ... [2018-09-30 20:44:43,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:44:43,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:44:43,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:44:43,347 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:44:43,348 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 08:44:43" (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 20:44:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:44:43,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:44:43,694 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:44:43,694 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:44:43 BoogieIcfgContainer [2018-09-30 20:44:43,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:44:43,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:44:43,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:44:43,699 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:44:43,699 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 08:44:43" (1/2) ... [2018-09-30 20:44:43,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7cc4f4 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:44:43, skipping insertion in model container [2018-09-30 20:44:43,700 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 08:44:43" (2/2) ... [2018-09-30 20:44:43,702 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-09-30 20:44:43,712 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:44:43,719 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:44:43,769 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:44:43,770 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:44:43,770 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:44:43,770 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:44:43,770 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:44:43,770 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:44:43,771 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:44:43,771 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:44:43,771 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:44:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:44:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:44:43,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:43,793 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:44:43,794 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:43,801 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:44:43,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:43,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:43,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:43,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:43,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:44,009 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 20:44:44,011 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:44:44,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:44:44,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:44:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:44:44,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:44,028 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:44:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:44,278 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 20:44:44,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:44:44,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:44:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:44,291 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:44:44,292 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:44:44,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:44:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:44:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-30 20:44:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:44:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:44:44,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-30 20:44:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:44,325 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:44:44,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:44:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:44:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:44:44,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:44,326 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:44:44,326 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:44,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-30 20:44:44,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:44,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:44,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:44,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:44,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:44,368 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 20:44:44,368 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:44:44,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:44:44,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:44:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:44:44,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:44,371 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-09-30 20:44:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:44,442 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-30 20:44:44,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:44:44,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-30 20:44:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:44,444 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:44:44,444 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:44:44,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:44:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:44:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:44:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:44:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:44:44,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 20:44:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:44,450 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:44:44,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:44:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:44:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:44:44,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:44,451 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:44:44,451 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:44,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-30 20:44:44,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:44,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:44,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:44,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:44,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:44,555 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 20:44:44,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:44,556 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 20:44:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:44,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:44,923 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 20:44:44,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:44,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-30 20:44:44,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:44:44,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:44:44,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:44,954 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-30 20:44:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:45,800 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-09-30 20:44:45,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:44:45,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 20:44:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:45,802 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:44:45,802 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:44:45,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:44:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:44:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-09-30 20:44:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:44:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 20:44:45,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-09-30 20:44:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:45,811 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 20:44:45,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:44:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 20:44:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:44:45,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:45,812 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-09-30 20:44:45,813 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:45,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-09-30 20:44:45,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:45,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:45,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:45,931 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 20:44:45,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:45,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:45,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:44:45,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:44:45,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:45,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:46,507 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 20:44:46,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:46,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 20:44:46,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:44:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:44:46,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:46,530 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-09-30 20:44:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:47,320 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-30 20:44:47,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:44:47,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 20:44:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:47,322 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:44:47,322 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:44:47,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:44:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:44:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-09-30 20:44:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:44:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-09-30 20:44:47,332 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-09-30 20:44:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:47,333 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-09-30 20:44:47,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:44:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-09-30 20:44:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:44:47,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:47,334 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-09-30 20:44:47,334 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:47,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-09-30 20:44:47,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:47,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:47,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:47,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:47,444 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 20:44:47,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:47,444 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 20:44:47,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:47,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:44:47,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:47,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:47,537 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 20:44:47,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:47,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:44:47,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:44:47,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:44:47,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:47,563 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-09-30 20:44:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:47,760 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-09-30 20:44:47,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:44:47,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-09-30 20:44:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:47,762 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:44:47,763 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:44:47,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:44:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:44:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:44:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:44:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-30 20:44:47,772 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-09-30 20:44:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:47,773 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-30 20:44:47,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:44:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-30 20:44:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:44:47,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:47,774 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-30 20:44:47,775 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:47,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-30 20:44:47,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:47,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:47,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:47,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:47,981 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 20:44:47,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:47,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:44:47,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:48,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:48,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:48,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:48,230 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 20:44:48,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:48,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-09-30 20:44:48,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:44:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:44:48,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:48,261 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-09-30 20:44:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:49,032 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-09-30 20:44:49,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:44:49,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-09-30 20:44:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:49,034 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:44:49,034 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:44:49,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:44:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:44:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-09-30 20:44:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:44:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-30 20:44:49,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-09-30 20:44:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:49,049 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-30 20:44:49,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:44:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-30 20:44:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:44:49,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:49,051 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-09-30 20:44:49,051 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:49,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-09-30 20:44:49,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:49,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:49,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:49,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:49,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:49,281 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 20:44:49,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:49,281 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 20:44:49,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:49,319 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:44:49,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:49,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:49,424 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 20:44:49,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:49,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 20:44:49,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:44:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:44:49,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:49,447 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-09-30 20:44:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:53,550 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-09-30 20:44:53,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:44:53,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-09-30 20:44:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:53,552 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:44:53,552 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:44:53,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:44:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:44:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-09-30 20:44:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:44:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-09-30 20:44:53,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-09-30 20:44:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:53,570 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-09-30 20:44:53,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:44:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-09-30 20:44:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:44:53,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:53,572 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-09-30 20:44:53,573 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:53,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-09-30 20:44:53,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:53,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:53,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:53,805 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 20:44:53,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:53,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:44:53,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:44:53,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 20:44:53,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:53,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:54,049 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 20:44:54,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:54,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:44:54,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:44:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:44:54,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:54,071 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-09-30 20:44:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:58,279 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-09-30 20:44:58,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:44:58,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-09-30 20:44:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:58,281 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:44:58,281 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:44:58,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:44:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:44:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-09-30 20:44:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:44:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-09-30 20:44:58,309 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-09-30 20:44:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:58,310 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-09-30 20:44:58,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:44:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-09-30 20:44:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:44:58,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:58,312 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-09-30 20:44:58,312 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:58,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-09-30 20:44:58,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:58,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:58,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:58,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:58,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:58,521 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 20:44:58,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:58,521 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 20:44:58,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:58,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:59,088 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 20:44:59,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:59,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-09-30 20:44:59,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:44:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:44:59,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:59,108 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-09-30 20:45:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:00,279 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-09-30 20:45:00,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:45:00,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-09-30 20:45:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:00,281 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:45:00,281 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:45:00,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:45:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:45:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-09-30 20:45:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:45:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-09-30 20:45:00,303 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-09-30 20:45:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:00,304 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-09-30 20:45:00,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:45:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-09-30 20:45:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:45:00,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:00,306 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-09-30 20:45:00,306 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:00,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-09-30 20:45:00,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:00,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:00,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:00,654 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 20:45:00,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:00,655 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 20:45:00,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:45:00,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:45:00,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:00,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:00,941 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 20:45:00,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:00,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:45:00,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:45:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:45:00,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:00,963 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-09-30 20:45:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:01,531 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-09-30 20:45:01,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:45:01,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-09-30 20:45:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:01,534 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:45:01,534 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:45:01,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:45:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:45:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-09-30 20:45:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:45:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-09-30 20:45:01,560 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-09-30 20:45:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:01,560 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-09-30 20:45:01,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:45:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-09-30 20:45:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:45:01,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:01,563 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-09-30 20:45:01,563 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:01,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-09-30 20:45:01,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:01,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:01,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:01,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:01,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:01,870 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 20:45:01,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:01,870 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 20:45:01,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:45:01,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:45:01,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:01,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:02,142 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 20:45:02,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:02,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 20:45:02,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:45:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:45:02,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:02,163 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-09-30 20:45:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:10,308 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-09-30 20:45:10,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:45:10,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-09-30 20:45:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:10,309 INFO L225 Difference]: With dead ends: 299 [2018-09-30 20:45:10,310 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:45:10,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time [2018-09-30 20:45:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:45:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-09-30 20:45:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:45:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-09-30 20:45:10,338 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-09-30 20:45:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:10,339 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-09-30 20:45:10,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:45:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-09-30 20:45:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 20:45:10,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:10,342 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-09-30 20:45:10,342 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:10,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-09-30 20:45:10,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:10,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:10,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:10,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:10,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:10,670 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 20:45:10,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:10,670 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 20:45:10,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:45:10,738 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:45:10,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:10,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:10,976 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 20:45:10,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:10,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 20:45:10,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:45:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:45:10,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:10,998 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-09-30 20:45:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:22,340 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-09-30 20:45:22,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:45:22,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-09-30 20:45:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:22,342 INFO L225 Difference]: With dead ends: 371 [2018-09-30 20:45:22,343 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 20:45:22,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time [2018-09-30 20:45:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 20:45:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-09-30 20:45:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 20:45:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-09-30 20:45:22,374 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-09-30 20:45:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:22,374 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-09-30 20:45:22,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:45:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-09-30 20:45:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 20:45:22,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:22,378 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-09-30 20:45:22,378 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:22,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-09-30 20:45:22,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:22,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:22,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:22,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:22,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:22,772 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 20:45:22,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:22,772 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 20:45:22,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:45:22,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:45:22,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:22,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:23,239 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 20:45:23,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:23,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-09-30 20:45:23,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:45:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:45:23,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:23,263 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-09-30 20:45:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:37,318 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-09-30 20:45:37,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:45:37,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-09-30 20:45:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:37,319 INFO L225 Difference]: With dead ends: 451 [2018-09-30 20:45:37,320 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:45:37,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s Time [2018-09-30 20:45:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:45:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-09-30 20:45:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 20:45:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-09-30 20:45:37,348 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-09-30 20:45:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:37,348 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-09-30 20:45:37,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:45:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-09-30 20:45:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 20:45:37,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:37,352 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-09-30 20:45:37,352 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:37,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-09-30 20:45:37,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:37,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:37,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:37,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:38,243 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 20:45:38,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:38,244 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 20:45:38,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:45:43,070 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 20:45:43,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:43,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:43,341 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 20:45:43,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:43,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-30 20:45:43,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:45:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:45:43,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:43,362 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-09-30 20:46:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:03,468 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-09-30 20:46:03,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:46:03,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-09-30 20:46:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:03,470 INFO L225 Difference]: With dead ends: 539 [2018-09-30 20:46:03,470 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 20:46:03,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s Time [2018-09-30 20:46:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 20:46:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-09-30 20:46:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 20:46:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-09-30 20:46:03,507 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-09-30 20:46:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:03,507 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-09-30 20:46:03,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:46:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-09-30 20:46:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 20:46:03,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:03,511 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-09-30 20:46:03,512 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:03,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-09-30 20:46:03,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:03,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:03,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:03,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:03,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:04,028 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 20:46:04,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:04,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:04,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:04,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:04,774 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 20:46:04,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:04,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:46:04,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:46:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:46:04,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:04,805 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-09-30 20:46:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:06,112 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-09-30 20:46:06,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:46:06,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-09-30 20:46:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:06,114 INFO L225 Difference]: With dead ends: 341 [2018-09-30 20:46:06,115 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 20:46:06,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:46:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 20:46:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-09-30 20:46:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 20:46:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-09-30 20:46:06,167 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-09-30 20:46:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:06,167 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-09-30 20:46:06,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:46:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-09-30 20:46:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 20:46:06,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:06,169 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-09-30 20:46:06,169 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:06,170 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-09-30 20:46:06,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:06,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:06,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:07,050 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 20:46:07,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:07,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:07,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:46:07,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:46:07,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:07,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:07,865 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 20:46:07,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:07,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:46:07,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:46:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:46:07,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:07,887 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-09-30 20:46:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:09,471 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-09-30 20:46:09,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:46:09,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-09-30 20:46:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:09,474 INFO L225 Difference]: With dead ends: 365 [2018-09-30 20:46:09,474 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 20:46:09,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:46:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 20:46:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-09-30 20:46:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 20:46:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-09-30 20:46:09,525 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-09-30 20:46:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:09,525 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-09-30 20:46:09,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:46:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-09-30 20:46:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-30 20:46:09,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:09,528 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-09-30 20:46:09,528 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:09,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-09-30 20:46:09,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:09,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:09,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:10,279 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 20:46:10,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:10,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:10,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown