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/toy/tooDifficultLoopInvariant/Luxembourg.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:41:04,671 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:41:04,674 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:41:04,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:41:04,691 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:41:04,693 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:41:04,694 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:41:04,696 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:41:04,698 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:41:04,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:41:04,700 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:41:04,747 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 [2018-09-28 10:41:04,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:41:04,774 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:41:04,775 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:41:04,775 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:41:04,776 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:41:04,776 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:41:04,776 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:41:04,776 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:41:04,780 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:41:04,781 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:41:04,781 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:41:04,781 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:41:04,781 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:41:04,781 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:41:04,782 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:41:04,782 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:41:04,782 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:41:04,782 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:41:04,784 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:41:04,784 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:41:04,784 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:41:04,784 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:41:04,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:41:04,785 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:41:04,785 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:41:04,785 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:41:04,785 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:41:04,785 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:41:04,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:41:04,786 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:41:04,786 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:41:04,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:41:04,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:41:04,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:41:04,887 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:41:04,888 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:41:04,888 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl [2018-09-28 10:41:04,889 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl' [2018-09-28 10:41:04,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:41:04,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:41:04,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:41:04,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:41:04,937 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:41:04,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,975 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:41:04,976 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:41:04,976 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:41:04,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:41:04,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:41:04,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:41:04,979 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:41:04,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:04,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/1) ... [2018-09-28 10:41:05,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:41:05,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:41:05,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:41:05,002 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:41:05,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (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 [2018-09-28 10:41:05,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:41:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:41:05,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:41:05,218 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:41:05,218 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:41:05 BoogieIcfgContainer [2018-09-28 10:41:05,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:41:05,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:41:05,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:41:05,223 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:41:05,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:41:04" (1/2) ... [2018-09-28 10:41:05,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fc07cc and model type Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:41:05, skipping insertion in model container [2018-09-28 10:41:05,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:41:05" (2/2) ... [2018-09-28 10:41:05,227 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg.bpl [2018-09-28 10:41:05,235 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:41:05,242 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:41:05,290 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:41:05,291 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:41:05,291 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:41:05,291 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:41:05,292 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:41:05,292 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:41:05,292 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:41:05,292 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:41:05,292 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:41:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:41:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:41:05,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:05,314 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:41:05,315 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:05,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-28 10:41:05,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:05,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,453 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:41:05,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:41:05,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:41:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:41:05,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:05,470 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:41:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:05,716 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-28 10:41:05,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:41:05,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:41:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:05,737 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:41:05,737 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:41:05,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:41:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:41:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:41:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:41:05,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:41:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:05,774 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:41:05,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:41:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:41:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:41:05,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:05,775 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:41:05,775 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:05,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-28 10:41:05,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:05,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:05,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:05,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:05,859 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 [2018-09-28 10:41:05,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:05,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:41:05,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:41:05,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:41:05,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:05,993 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:41:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:06,282 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:41:06,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:41:06,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:41:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:06,285 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:41:06,285 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:41:06,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:41:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:41:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:41:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:41:06,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:41:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:06,291 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:41:06,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:41:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:41:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:41:06,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:06,292 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:41:06,292 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:06,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-28 10:41:06,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:06,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:06,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:06,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:06,343 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) [2018-09-28 10:41:06,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:06,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:06,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:06,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:06,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:41:06,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:41:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:41:06,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:06,428 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:41:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:06,600 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:41:06,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:41:06,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:41:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:06,601 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:41:06,601 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:41:06,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:41:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:41:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:41:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:41:06,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:41:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:06,605 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:41:06,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:41:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:41:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:41:06,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:06,606 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:41:06,606 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:06,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-28 10:41:06,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:06,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:06,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:06,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:06,799 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 [2018-09-28 10:41:06,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:06,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:41:06,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:06,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:06,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:41:06,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:41:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:41:06,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:06,888 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:41:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:07,023 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:41:07,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:41:07,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:41:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:07,026 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:41:07,026 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:41:07,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:41:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:41:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:41:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:41:07,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:41:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:07,030 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:41:07,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:41:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:41:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:41:07,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:07,031 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:41:07,031 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:07,031 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-28 10:41:07,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:07,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:07,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:07,098 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 [2018-09-28 10:41:07,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:07,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:07,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:07,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:07,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:41:07,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:41:07,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:41:07,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:07,259 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:41:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:07,333 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:41:07,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:41:07,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:41:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:07,336 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:41:07,336 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:41:07,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:41:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:41:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:41:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:41:07,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:41:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:07,339 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:41:07,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:41:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:41:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:41:07,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:07,340 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:41:07,340 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:07,341 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-28 10:41:07,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:07,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:07,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:07,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:07,425 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 [2018-09-28 10:41:07,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:07,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:41:07,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:07,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:07,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:41:07,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:41:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:41:07,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:07,513 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:41:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:07,735 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:41:07,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:41:07,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:41:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:07,737 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:41:07,737 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:41:07,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:41:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:41:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:41:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:41:07,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:41:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:07,740 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:41:07,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:41:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:41:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:41:07,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:07,741 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:41:07,742 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:07,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-28 10:41:07,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:07,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:07,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:07,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:08,117 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 [2018-09-28 10:41:08,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:08,137 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:41:08,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:08,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:08,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:41:08,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:41:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:41:08,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:08,220 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:41:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:08,320 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:41:08,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:41:08,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:41:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:08,321 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:41:08,321 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:41:08,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:41:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:41:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:41:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:41:08,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:41:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:08,325 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:41:08,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:41:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:41:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:41:08,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:08,326 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:41:08,326 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:08,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-28 10:41:08,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:08,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:08,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:08,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:08,462 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 [2018-09-28 10:41:08,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:08,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:08,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:08,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:08,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:08,543 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:41:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:08,630 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:41:08,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:08,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:41:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:08,631 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:41:08,631 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:41:08,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:41:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:41:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:41:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:41:08,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:41:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:08,635 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:41:08,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:41:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:41:08,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:08,635 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:41:08,636 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:08,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-28 10:41:08,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:08,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:08,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:08,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:08,740 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 [2018-09-28 10:41:08,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:08,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:08,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:08,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:08,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:41:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:41:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:41:08,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:08,835 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:41:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:09,145 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:41:09,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:41:09,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:41:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:09,147 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:41:09,147 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:41:09,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:41:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:41:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:41:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:41:09,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:41:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:09,150 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:41:09,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:41:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:41:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:41:09,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:09,151 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:41:09,152 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:09,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-28 10:41:09,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:09,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:09,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:09,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:09,278 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 [2018-09-28 10:41:09,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:09,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:41:09,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:09,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:09,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:41:09,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:41:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:41:09,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:09,408 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:41:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:09,494 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:41:09,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:41:09,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:41:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:09,496 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:41:09,496 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:41:09,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:41:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:41:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:41:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:41:09,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:41:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:09,501 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:41:09,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:41:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:41:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:41:09,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:09,501 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:41:09,501 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:09,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-28 10:41:09,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:09,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:09,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:09,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:09,599 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 [2018-09-28 10:41:09,607 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:09,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:09,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:09,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:09,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:41:09,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:41:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:41:09,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:09,687 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:41:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:09,781 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:41:09,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:41:09,781 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:41:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:09,782 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:41:09,782 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:41:09,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:41:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:41:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:41:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:41:09,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:41:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:09,787 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:41:09,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:41:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:41:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:41:09,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:09,788 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:41:09,788 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:09,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-28 10:41:09,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:09,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:09,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:09,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:09,901 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 [2018-09-28 10:41:09,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:09,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:41:09,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:09,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:10,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:41:10,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:41:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:41:10,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:10,034 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:41:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:10,145 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:41:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:41:10,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:41:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:10,147 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:41:10,147 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:41:10,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:41:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:41:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:41:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:41:10,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:41:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:10,151 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:41:10,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:41:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:41:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:41:10,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:10,152 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:41:10,152 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:10,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-28 10:41:10,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:10,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:10,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:10,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:10,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:41:10,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:10,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:41:10,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:10,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:10,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:41:10,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:41:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:41:10,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:10,380 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:41:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:10,496 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:41:10,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:41:10,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:41:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:10,498 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:41:10,498 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:41:10,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:41:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:41:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:41:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:41:10,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:41:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:10,502 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:41:10,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:41:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:41:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:41:10,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:10,503 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:41:10,503 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:10,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-28 10:41:10,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:10,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:10,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:10,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:10,598 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 [2018-09-28 10:41:10,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:10,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:10,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:41:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:41:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:41:10,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:10,742 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:41:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:10,994 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:41:10,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:41:10,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:41:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:10,997 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:41:10,998 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:41:10,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:41:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:41:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:41:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:41:11,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:41:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:11,002 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:41:11,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:41:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:41:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:11,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:11,002 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:41:11,003 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:11,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-28 10:41:11,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:11,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:11,210 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 [2018-09-28 10:41:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:11,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:11,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:11,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:11,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:41:11,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:41:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:41:11,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:11,311 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:41:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:11,475 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:41:11,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:41:11,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:41:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:11,476 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:41:11,476 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:41:11,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:41:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:41:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:41:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:41:11,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:41:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:11,480 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:41:11,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:41:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:41:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:41:11,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:11,481 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:41:11,481 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:11,481 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-28 10:41:11,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:11,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:11,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:11,753 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 [2018-09-28 10:41:11,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:11,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:41:11,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:11,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:11,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:41:11,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:41:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:41:11,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:11,904 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:41:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:12,094 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:41:12,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:41:12,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:41:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:12,096 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:41:12,096 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:41:12,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:41:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:41:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:41:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:41:12,100 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:41:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:12,100 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:41:12,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:41:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:41:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:41:12,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:12,101 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:41:12,101 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:12,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-28 10:41:12,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:12,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:12,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:12,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:12,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:12,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:12,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:12,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:12,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:12,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:12,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:12,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:41:12,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:41:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:41:12,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:12,774 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:41:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:12,946 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:41:12,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:41:12,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:41:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:12,947 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:41:12,947 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:41:12,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:41:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:41:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:41:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:41:12,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:41:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:12,950 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:41:12,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:41:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:41:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:41:12,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:12,951 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:41:12,951 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:12,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:12,952 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-28 10:41:12,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:12,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:13,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:13,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:13,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:41:13,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:13,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:13,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:41:13,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:41:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:41:13,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:13,465 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:41:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:13,613 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:41:13,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:41:13,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:41:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:13,614 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:41:13,614 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:41:13,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:41:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:41:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:41:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:41:13,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:41:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:13,618 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:41:13,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:41:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:41:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:41:13,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:13,619 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:41:13,619 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:13,620 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-28 10:41:13,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:13,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:13,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:13,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:13,947 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:41:13,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:13,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:14,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:41:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:41:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:41:14,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:14,050 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:41:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:14,316 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:41:14,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:41:14,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:41:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:14,318 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:41:14,318 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:41:14,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:41:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:41:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:41:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:41:14,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:41:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:14,322 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:41:14,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:41:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:41:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:41:14,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:14,323 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:41:14,324 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:14,324 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-28 10:41:14,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:14,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:14,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:14,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:14,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:14,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:41:14,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:41:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:41:14,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:14,596 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:41:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:14,905 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:41:14,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:41:14,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:41:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:14,907 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:41:14,907 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:41:14,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:41:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:41:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:41:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:41:14,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:41:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:14,912 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:41:14,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:41:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:41:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:41:14,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:14,913 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:41:14,913 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:14,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-28 10:41:14,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:14,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:14,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:14,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:15,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:15,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:15,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:15,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:15,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:15,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:41:15,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:41:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:41:15,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:15,327 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:41:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:15,525 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:41:15,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:41:15,527 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:41:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:15,528 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:41:15,528 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:41:15,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:41:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:41:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:41:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:41:15,532 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:41:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:15,532 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:41:15,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:41:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:41:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:41:15,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:15,533 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:41:15,533 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:15,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-28 10:41:15,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:15,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:15,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:15,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:15,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:15,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:15,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:41:15,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:15,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:16,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:41:16,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:41:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:41:16,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:16,103 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:41:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:16,415 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:41:16,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:41:16,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:41:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:16,420 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:41:16,420 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:41:16,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:41:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:41:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:41:16,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:41:16,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:16,423 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:41:16,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:41:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:41:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:41:16,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:16,424 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:41:16,424 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:16,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-28 10:41:16,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:16,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:16,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:16,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:16,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:16,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:16,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:16,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:16,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:16,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:16,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:41:16,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:41:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:41:16,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:16,777 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:41:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:17,224 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:41:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:41:17,224 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:41:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:17,225 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:41:17,225 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:41:17,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:41:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:41:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:41:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:41:17,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:41:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:17,228 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:41:17,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:41:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:41:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:41:17,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:17,228 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:41:17,229 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:17,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-28 10:41:17,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:17,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:17,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:17,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:17,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:17,395 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:17,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:41:17,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:17,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:17,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:41:17,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:41:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:41:17,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:17,496 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:41:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:17,861 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:41:17,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:41:17,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:41:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:17,867 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:41:17,867 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:41:17,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:41:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:41:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:41:17,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:41:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:17,872 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:41:17,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:41:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:41:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:41:17,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:17,873 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:41:17,873 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:17,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-28 10:41:17,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:17,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:17,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:17,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:18,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:18,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:18,102 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:41:18,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:18,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:18,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:41:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:41:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:41:18,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:18,221 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:41:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:18,433 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:41:18,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:41:18,433 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:41:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:18,434 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:41:18,434 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:41:18,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:41:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:41:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:41:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:41:18,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:41:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:18,439 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:41:18,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:41:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:41:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:41:18,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:18,440 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:41:18,440 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:18,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-28 10:41:18,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:18,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:18,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:18,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:18,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:18,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:18,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:18,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:41:18,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:41:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:41:18,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:18,803 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:41:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:18,967 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:41:18,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:41:18,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:41:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:18,968 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:41:18,968 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:41:18,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:41:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:41:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:41:18,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:41:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:18,972 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:41:18,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:41:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:41:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:41:18,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:18,973 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:41:18,973 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:18,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-28 10:41:18,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:18,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:18,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:18,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:19,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:19,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:19,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:19,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:19,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:19,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:19,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:19,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:41:19,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:41:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:41:19,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:19,739 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:41:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:19,945 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:41:19,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:41:19,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:41:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:19,946 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:41:19,946 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:41:19,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:41:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:41:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:41:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:41:19,950 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:41:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:19,950 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:41:19,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:41:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:41:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:41:19,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:19,951 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:41:19,951 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:19,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-28 10:41:19,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:19,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:19,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:20,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:20,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:20,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:20,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:41:20,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:20,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:20,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:20,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:41:20,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:41:20,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:41:20,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:20,927 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:41:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:21,319 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:41:21,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:41:21,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:41:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:21,320 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:41:21,320 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:41:21,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:41:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:41:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:41:21,325 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:41:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:21,326 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:41:21,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:41:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:41:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:41:21,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:21,327 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:41:21,327 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:21,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-28 10:41:21,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:21,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:21,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:21,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:21,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:21,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:21,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:21,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:21,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:21,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:41:21,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:41:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:41:21,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:21,622 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:41:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:21,807 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:41:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:41:21,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:41:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:21,808 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:41:21,808 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:41:21,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:41:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:41:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:41:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:41:21,812 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:41:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:21,813 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:41:21,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:41:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:41:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:41:21,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:21,814 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:41:21,814 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:21,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:21,814 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-28 10:41:21,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:21,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:21,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:21,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:22,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:22,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:22,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:41:22,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:22,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:22,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:41:22,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:41:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:41:22,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:22,137 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:41:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:22,348 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:41:22,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:41:22,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:41:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:22,349 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:41:22,349 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:41:22,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:41:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:41:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:41:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:41:22,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:41:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:22,355 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:41:22,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:41:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:41:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:41:22,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:22,356 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:41:22,356 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:22,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-28 10:41:22,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:22,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:22,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:22,570 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:22,645 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:41:22,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:22,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:22,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:41:22,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:41:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:41:22,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:22,796 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:41:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:22,983 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:41:22,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:41:22,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:41:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:22,984 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:41:22,984 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:41:22,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:41:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:41:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:41:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:41:22,988 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:41:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:22,988 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:41:22,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:41:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:41:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:41:22,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:22,989 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:41:22,989 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:22,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-28 10:41:22,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:22,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:22,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:22,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:23,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:23,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:23,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:23,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:23,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:23,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:41:23,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:41:23,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:41:23,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:23,291 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:41:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:23,748 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:41:23,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:41:23,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:41:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:23,749 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:41:23,749 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:41:23,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:41:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:41:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:41:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:41:23,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:41:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:23,757 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:41:23,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:41:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:41:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:41:23,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:23,757 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:41:23,758 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:23,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-28 10:41:23,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:23,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:23,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:23,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:23,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:23,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:23,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:23,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:23,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:23,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:23,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:24,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:24,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:41:24,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:41:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:41:24,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:24,110 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:41:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:24,317 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:41:24,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:41:24,317 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:41:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:24,318 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:41:24,318 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:41:24,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:41:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:41:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:41:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:41:24,322 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:41:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:24,322 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:41:24,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:41:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:41:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:41:24,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:24,323 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:41:24,324 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:24,324 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-28 10:41:24,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:24,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:24,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:24,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:24,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:24,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:24,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:41:24,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:24,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:24,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:24,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:41:24,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:41:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:41:24,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:24,838 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:41:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:25,058 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:41:25,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:41:25,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:41:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:25,060 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:41:25,060 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:41:25,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:41:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:41:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:41:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:41:25,062 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:41:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:25,062 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:41:25,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:41:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:41:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:41:25,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:25,063 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:41:25,063 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:25,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-28 10:41:25,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:25,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:25,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:25,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:25,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:25,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:25,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:25,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:25,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:25,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:41:25,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:41:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:41:25,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:25,544 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:41:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:25,706 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:41:25,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:41:25,707 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:41:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:25,707 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:25,707 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:25,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:41:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:41:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:41:25,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:41:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:25,710 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:41:25,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:41:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:41:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:41:25,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:25,711 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:41:25,711 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:25,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-28 10:41:25,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:25,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:25,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:25,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:25,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:25,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:25,890 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:25,919 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:41:25,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:25,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:26,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:41:26,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:41:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:41:26,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:26,067 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:41:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:26,324 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:41:26,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:41:26,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:41:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:26,325 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:41:26,325 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:41:26,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:41:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:41:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:41:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:41:26,328 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:41:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:26,328 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:41:26,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:41:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:41:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:41:26,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:26,329 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:41:26,329 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:26,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-28 10:41:26,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:26,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:26,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:26,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:26,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:41:26,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:26,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:27,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:27,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:41:27,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:41:27,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:41:27,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:27,247 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:41:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:27,477 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:41:27,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:41:27,478 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:41:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:27,478 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:41:27,478 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:27,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:41:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:41:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:41:27,481 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:41:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:27,481 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:41:27,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:41:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:41:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:41:27,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:27,482 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:41:27,482 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:27,482 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-28 10:41:27,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:27,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:27,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:27,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:27,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:27,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:27,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:27,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:27,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:27,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:27,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:41:27,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:41:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:41:27,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:27,850 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:41:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:28,076 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:41:28,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:41:28,077 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:41:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:28,077 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:41:28,077 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:41:28,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:41:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:41:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:41:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:41:28,080 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:41:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:28,081 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:41:28,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:41:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:41:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:41:28,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:28,081 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:41:28,082 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:28,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-28 10:41:28,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:28,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:28,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:28,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:28,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:28,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:28,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:28,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:28,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:28,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:41:28,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:41:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:41:28,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:28,714 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:41:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:28,892 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:41:28,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:41:28,893 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:41:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:28,893 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:28,893 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:28,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:41:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:41:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:41:28,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:41:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:28,897 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:41:28,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:41:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:41:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:41:28,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:28,897 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:41:28,898 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:28,898 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-28 10:41:28,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:28,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:28,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:28,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:29,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:29,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:29,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:29,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:41:29,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:29,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:29,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:29,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:41:29,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:41:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:41:29,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:29,260 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:41:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:29,670 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:41:29,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:41:29,670 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:41:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:29,671 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:41:29,671 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:41:29,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:41:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:41:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:41:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:41:29,675 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:41:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:29,675 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:41:29,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:41:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:41:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:41:29,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:29,676 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:41:29,676 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:29,676 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-28 10:41:29,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:29,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:29,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:29,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:29,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:30,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:30,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:30,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:30,431 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:30,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:30,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:30,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:30,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:41:30,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:41:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:41:30,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:30,579 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:41:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:30,794 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:41:30,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:41:30,795 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:41:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:30,795 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:30,795 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:30,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:41:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:41:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:41:30,797 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:41:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:30,798 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:41:30,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:41:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:41:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:41:30,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:30,799 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:41:30,799 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:30,799 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-28 10:41:30,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:30,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:30,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:30,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:30,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:31,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:31,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:31,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:31,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:41:31,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:31,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:31,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:31,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:41:31,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:41:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:41:31,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:31,288 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:41:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:31,695 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:41:31,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:41:31,696 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:41:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:31,696 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:41:31,696 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:41:31,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:41:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:41:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:41:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:41:31,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:41:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:31,699 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:41:31,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:41:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:41:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:41:31,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:31,700 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:41:31,700 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:31,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-28 10:41:31,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:31,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:32,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:32,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:32,093 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:41:32,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:32,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:32,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:41:32,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:41:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:41:32,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:32,214 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:41:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:32,474 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:41:32,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:41:32,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:41:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:32,475 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:32,475 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:32,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:41:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:41:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:41:32,478 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:41:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:32,479 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:41:32,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:41:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:41:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:41:32,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:32,480 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:41:32,480 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:32,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-28 10:41:32,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:32,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:32,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:32,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:32,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:32,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:32,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:32,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:32,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:41:32,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:41:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:41:32,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:32,855 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:41:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:33,206 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:41:33,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:41:33,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:41:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:33,207 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:41:33,207 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:41:33,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:41:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:41:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:41:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:41:33,209 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:41:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:33,209 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:41:33,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:41:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:41:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:41:33,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:33,210 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:41:33,210 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:33,210 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:33,211 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-28 10:41:33,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:33,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:33,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:33,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:33,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:33,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:33,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:33,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:33,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:33,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:33,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:41:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:41:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:41:33,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:33,560 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:41:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:33,841 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:41:33,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:41:33,842 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:41:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:33,843 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:33,843 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:33,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:41:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:41:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:41:33,845 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:41:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:33,846 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:41:33,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:41:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:41:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:41:33,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:33,846 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:41:33,847 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:33,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:33,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-28 10:41:33,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:33,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:33,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:33,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:34,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:34,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:34,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:41:34,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:34,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:34,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:34,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:41:34,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:41:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:41:34,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:34,366 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:41:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:34,808 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:41:34,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:41:34,808 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:41:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:34,809 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:41:34,809 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:41:34,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:41:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:41:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:41:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:41:34,811 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:41:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:34,811 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:41:34,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:41:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:41:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:41:34,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:34,811 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:41:34,811 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:34,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-28 10:41:34,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:34,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:34,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:34,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:34,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:35,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:35,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:35,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:35,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:35,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:35,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:35,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:35,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:41:35,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:41:35,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:41:35,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:35,318 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:41:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:35,606 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:41:35,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:41:35,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:41:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:35,607 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:35,607 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:35,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:41:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:41:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:41:35,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:41:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:35,609 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:41:35,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:41:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:41:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:41:35,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:35,610 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:41:35,610 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:35,610 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-28 10:41:35,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:35,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:35,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:35,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:35,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:35,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:36,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:41:36,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:36,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:36,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:41:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:41:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:41:36,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:36,140 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:41:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:36,375 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:41:36,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:41:36,380 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:41:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:36,381 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:41:36,381 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:41:36,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:41:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:41:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:41:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:41:36,384 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:41:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:36,384 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:41:36,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:41:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:41:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:41:36,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:36,385 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:41:36,385 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:36,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-28 10:41:36,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:36,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:36,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:36,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:36,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:36,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:36,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:41:36,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:36,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:36,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:41:36,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:41:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:41:36,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:36,801 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:41:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:37,013 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:41:37,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:41:37,013 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:41:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:37,014 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:37,014 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:37,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:41:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:41:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:41:37,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:41:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:37,020 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:41:37,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:41:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:41:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:41:37,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:37,021 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:41:37,021 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:37,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-28 10:41:37,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:37,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:37,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:37,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:37,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:37,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:38,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:41:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:41:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:41:38,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:38,102 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:41:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:38,316 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:41:38,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:41:38,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:41:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:38,317 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:41:38,317 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:41:38,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:41:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:41:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:41:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:41:38,319 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:41:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:38,319 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:41:38,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:41:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:41:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:41:38,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:38,320 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:41:38,321 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:38,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-28 10:41:38,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:38,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:38,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:38,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:38,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:38,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:38,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:38,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:38,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:38,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:41:38,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:41:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:41:38,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:38,874 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:41:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:39,120 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:41:39,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:41:39,120 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:41:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:39,121 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:41:39,121 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:41:39,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:41:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:41:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:41:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:41:39,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:41:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:39,124 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:41:39,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:41:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:41:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:41:39,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:39,124 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:41:39,125 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:39,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-28 10:41:39,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:39,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:39,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:39,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:39,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:39,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:41:39,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:39,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:39,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:41:39,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:41:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:41:39,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:39,819 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:41:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:40,138 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:41:40,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:41:40,138 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:41:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:40,139 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:41:40,139 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:41:40,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:41:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:41:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:41:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:41:40,141 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:41:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:40,142 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:41:40,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:41:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:41:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:41:40,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:40,142 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:41:40,143 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:40,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-28 10:41:40,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:40,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:40,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:40,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:40,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:40,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:40,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:40,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:40,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:40,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:40,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:41:40,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:41:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:41:40,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:40,696 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:41:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:41,089 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:41:41,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:41:41,089 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:41:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:41,090 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:41,090 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:41,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:41:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:41:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:41:41,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:41:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:41,092 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:41:41,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:41:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:41:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:41:41,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:41,093 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:41:41,093 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:41,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-28 10:41:41,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:41,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:41,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:41,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:41,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:41,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:41,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:41,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:41,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:41:41,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:41,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:41,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:41,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:41:41,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:41:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:41:41,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:41,861 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:41:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:42,192 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:41:42,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:41:42,193 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:41:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:42,194 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:41:42,194 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:41:42,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:41:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:41:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:41:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:41:42,196 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:41:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:42,197 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:41:42,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:41:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:41:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:41:42,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:42,197 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:41:42,197 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:42,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-28 10:41:42,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:42,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:42,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:42,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:42,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:42,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:42,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:42,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:42,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:41:42,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:42,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:42,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:42,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:41:42,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:41:42,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:41:42,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:42,806 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:41:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:43,054 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:41:43,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:41:43,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:41:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:43,055 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:41:43,055 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:41:43,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:41:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:41:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:41:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:41:43,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:41:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:41:43,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:41:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:41:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:41:43,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:43,058 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:41:43,058 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:43,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-28 10:41:43,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:43,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:43,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:43,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:43,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:43,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:43,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:43,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:43,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:43,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:43,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:41:43,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:41:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:41:43,668 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:43,669 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:41:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:44,049 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:41:44,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:41:44,049 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:41:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:44,050 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:41:44,050 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:41:44,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:41:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:41:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:41:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:41:44,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:41:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:41:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:41:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:41:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:41:44,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:44,054 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:41:44,054 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:44,054 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-28 10:41:44,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:44,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:44,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:45,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:45,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:45,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:45,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:45,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:45,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:45,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:45,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:41:45,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:41:45,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:41:45,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:45,367 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:41:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:45,613 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:41:45,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:41:45,613 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:41:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:45,614 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:41:45,614 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:41:45,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:41:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:41:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:41:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:41:45,616 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:41:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:45,617 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:41:45,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:41:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:41:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:41:45,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:45,617 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:41:45,618 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:45,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-28 10:41:45,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:45,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:45,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:45,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:46,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:46,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:46,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:46,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:41:46,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:46,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:46,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:46,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:41:46,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:41:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:41:46,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:46,225 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:41:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:46,609 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:41:46,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:41:46,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:41:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:46,610 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:41:46,610 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:41:46,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:41:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:41:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:41:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:41:46,613 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:41:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:46,613 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:41:46,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:41:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:41:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:41:46,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:46,615 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:41:46,615 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:46,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-28 10:41:46,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:46,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:46,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:46,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:46,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:47,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:47,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:47,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:47,249 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:47,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:47,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:47,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:47,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:41:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:41:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:41:47,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:47,395 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:41:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:47,749 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:41:47,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:41:47,749 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:41:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:47,750 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:41:47,750 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:41:47,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:41:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:41:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:41:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:41:47,752 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:41:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:47,753 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:41:47,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:41:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:41:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:41:47,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:47,753 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:41:47,753 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:47,753 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-28 10:41:47,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:47,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:47,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:47,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:50,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:50,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:50,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:50,196 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:41:50,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:50,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:50,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:50,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:41:50,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:41:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:41:50,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:50,454 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:41:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:50,750 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:41:50,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:41:50,750 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:41:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:50,751 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:41:50,751 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:41:50,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:41:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:41:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:41:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:41:50,753 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:41:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:50,753 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:41:50,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:41:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:41:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:41:50,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:50,753 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:41:50,753 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:50,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-28 10:41:50,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:50,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:50,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:50,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:50,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:51,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:51,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:51,789 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:51,842 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:41:51,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:51,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:52,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:41:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:41:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:41:52,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:52,003 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:41:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:52,411 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:41:52,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:41:52,412 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:41:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:52,412 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:41:52,412 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:41:52,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:41:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:41:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:41:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:41:52,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:41:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:52,415 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:41:52,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:41:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:41:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:41:52,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:52,416 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:41:52,416 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:52,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-28 10:41:52,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:52,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:52,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:52,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:52,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:52,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:52,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:52,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:52,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:41:52,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:41:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:41:52,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:52,921 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:41:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:53,352 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:41:53,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:41:53,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:41:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:53,353 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:41:53,353 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:41:53,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:41:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:41:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:41:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:41:53,355 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:41:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:53,356 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:41:53,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:41:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:41:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:41:53,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:53,356 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:41:53,357 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:53,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-28 10:41:53,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:53,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:53,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:53,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:53,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:53,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:53,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:53,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:53,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:53,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:53,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:53,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:41:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:41:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:41:53,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:53,908 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:41:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:54,369 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:41:54,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:41:54,371 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:41:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:54,371 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:41:54,371 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:41:54,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:41:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:41:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:41:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:41:54,374 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:41:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:54,374 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:41:54,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:41:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:41:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:41:54,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:54,375 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:41:54,375 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:54,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:54,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-28 10:41:54,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:54,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:54,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:54,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:54,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:54,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:54,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:41:54,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:54,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:55,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:55,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:41:55,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:41:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:41:55,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:55,171 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:41:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:55,754 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:41:55,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:41:55,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:41:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:55,755 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:41:55,755 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:41:55,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:41:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:41:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:41:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:41:55,757 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:41:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:55,758 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:41:55,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:41:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:41:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:41:55,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:55,758 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:41:55,759 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:55,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-28 10:41:55,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:55,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:55,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:55,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:55,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:56,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:56,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:41:56,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:56,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:56,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:56,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:56,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:56,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:41:56,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:41:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:41:56,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:56,399 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:41:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:56,701 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:41:56,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:41:56,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:41:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:56,702 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:41:56,702 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:41:56,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:41:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:41:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:41:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:41:56,704 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:41:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:56,704 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:41:56,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:41:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:41:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:41:56,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:56,705 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:41:56,705 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:56,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-28 10:41:56,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:56,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:56,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:56,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:57,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:57,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:57,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:57,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:41:57,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:57,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:57,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:57,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:41:57,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:41:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:41:57,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:57,264 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:41:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:57,735 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:41:57,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:41:57,736 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:41:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:57,736 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:41:57,736 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:41:57,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:41:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:41:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:41:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:41:57,739 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:41:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:57,739 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:41:57,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:41:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:41:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:41:57,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:57,740 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:41:57,740 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:57,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-28 10:41:57,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:57,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:57,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:58,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:58,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:58,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:58,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:41:58,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:58,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:59,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:59,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:41:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:41:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:41:59,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:59,394 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:41:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:59,847 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:41:59,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:41:59,847 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:41:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:59,848 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:41:59,848 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:41:59,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:41:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:41:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:41:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:41:59,850 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:41:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:59,850 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:41:59,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:41:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:41:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:41:59,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:59,851 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:41:59,851 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:59,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-28 10:41:59,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:59,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:59,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:59,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:59,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:00,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:00,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:00,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:00,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:00,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:00,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:42:00,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:42:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:42:00,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:00,558 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:42:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:01,025 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:42:01,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:42:01,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:42:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:01,026 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:42:01,026 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:42:01,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:42:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:42:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:42:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:42:01,028 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:42:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:01,028 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:42:01,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:42:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:42:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:42:01,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:01,029 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:42:01,029 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:01,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-28 10:42:01,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:01,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:01,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:01,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:01,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:01,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:01,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:01,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:01,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:01,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:01,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:01,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:42:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:42:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:42:01,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:01,607 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:42:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:02,068 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:42:02,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:42:02,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:42:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:02,069 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:42:02,069 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:42:02,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:42:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:42:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:42:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:42:02,071 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:42:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:02,071 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:42:02,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:42:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:42:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:42:02,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:02,072 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:42:02,072 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:02,073 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-28 10:42:02,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:02,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:02,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:02,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:02,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:02,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:02,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:02,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:42:02,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:02,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:02,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:42:02,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:42:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:42:02,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:02,935 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:42:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:03,455 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:42:03,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:42:03,455 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:42:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:03,456 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:42:03,456 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:42:03,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:42:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:42:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:42:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:42:03,459 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:42:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:03,459 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:42:03,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:42:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:42:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:42:03,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:03,460 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:42:03,460 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:03,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-28 10:42:03,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:03,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:03,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:03,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:03,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:03,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:03,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:03,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:03,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:03,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:03,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:04,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:04,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:42:04,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:42:04,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:42:04,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:04,071 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:42:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:04,687 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:42:04,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:42:04,688 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:42:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:04,688 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:42:04,688 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:42:04,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:42:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:42:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:42:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:42:04,691 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:42:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:04,691 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:42:04,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:42:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:42:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:42:04,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:04,692 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:42:04,693 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:04,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-28 10:42:04,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:04,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:04,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:04,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:04,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:05,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:05,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:05,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:05,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:42:05,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:05,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:06,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:42:06,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:42:06,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:42:06,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:06,038 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:42:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:06,449 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:42:06,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:42:06,449 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:42:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:06,450 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:42:06,450 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:42:06,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:42:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:42:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:42:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:42:06,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:42:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:06,453 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:42:06,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:42:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:42:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:42:06,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:06,454 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:42:06,454 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:06,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-28 10:42:06,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:06,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:06,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:06,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:06,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:06,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:06,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:42:06,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:07,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:07,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:07,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:42:07,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:42:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:42:07,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:07,210 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-28 10:42:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:07,569 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:42:07,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:42:07,570 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-28 10:42:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:07,570 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:42:07,570 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:42:07,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:42:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:42:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:42:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:42:07,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:42:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:07,573 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:42:07,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:42:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:42:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:42:07,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:07,573 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:42:07,573 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:07,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-28 10:42:07,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:07,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:07,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:07,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:07,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:07,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:08,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:08,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:08,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:42:08,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:42:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:42:08,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:08,190 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-28 10:42:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:08,754 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:42:08,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:42:08,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-28 10:42:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:08,755 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:42:08,755 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:42:08,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:42:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:42:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:42:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:42:08,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:42:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:08,757 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:42:08,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:42:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:42:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:42:08,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:08,757 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-28 10:42:08,758 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:08,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-28 10:42:08,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:08,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:08,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:08,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:09,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:09,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:09,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:09,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:09,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:09,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:09,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:09,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:42:09,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:42:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:42:09,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:09,405 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-28 10:42:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:09,955 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:42:09,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:42:09,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-28 10:42:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:09,956 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:42:09,956 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:42:09,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:42:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:42:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:42:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:42:09,958 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:42:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:09,958 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:42:09,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:42:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:42:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:42:09,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:09,960 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:42:09,960 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:09,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:09,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-28 10:42:09,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:09,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:09,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:09,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:09,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:10,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:10,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:10,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:10,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:42:10,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:10,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:10,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:10,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:42:10,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:42:10,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:42:10,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:10,731 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-28 10:42:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:11,291 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:42:11,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:42:11,291 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-28 10:42:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:11,292 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:42:11,292 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:42:11,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:42:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:42:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:42:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:42:11,294 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:42:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:11,295 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:42:11,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:42:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:42:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:42:11,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:11,295 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-28 10:42:11,296 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:11,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-28 10:42:11,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:11,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:11,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:11,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:11,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:11,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:11,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:11,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:11,722 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:11,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:11,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:11,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:11,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:42:11,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:42:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:42:11,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:11,904 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-28 10:42:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:13,810 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:42:13,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:42:13,810 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-28 10:42:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:13,810 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:42:13,810 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:42:13,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:42:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:42:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:42:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:42:13,812 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:42:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:13,813 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:42:13,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:42:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:42:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:42:13,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:13,813 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-28 10:42:13,813 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:13,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-28 10:42:13,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:13,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:13,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:13,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:13,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:14,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:14,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:14,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:14,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:42:14,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:14,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:14,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:14,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:42:14,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:42:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:42:14,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:14,790 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-28 10:42:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:15,236 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:42:15,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:42:15,236 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-28 10:42:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:15,237 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:42:15,237 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:42:15,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:42:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:42:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:42:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:42:15,239 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:42:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:15,239 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:42:15,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:42:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:42:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:42:15,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:15,239 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-28 10:42:15,240 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:15,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:15,240 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-28 10:42:15,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:15,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:15,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:15,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:15,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:15,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:15,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:15,973 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:42:15,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:15,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:16,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:16,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:42:16,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:42:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:42:16,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:16,173 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-28 10:42:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:16,672 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:42:16,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:42:16,672 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-28 10:42:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:16,673 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:42:16,673 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:42:16,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:42:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:42:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:42:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:42:16,676 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:42:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:16,676 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:42:16,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:42:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:42:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:42:16,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:16,677 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-28 10:42:16,677 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:16,677 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-28 10:42:16,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:16,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:16,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:16,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:16,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:17,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:17,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:17,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:17,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:17,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:17,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:42:17,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:42:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:42:17,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:17,761 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-28 10:42:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:18,378 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:42:18,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:42:18,378 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-28 10:42:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:18,379 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:42:18,379 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:42:18,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:42:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:42:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:42:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:42:18,381 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:42:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:18,381 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:42:18,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:42:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:42:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:42:18,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:18,382 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-28 10:42:18,382 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:18,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-28 10:42:18,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:18,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:18,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:18,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:18,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:18,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:18,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:18,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:18,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:18,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:18,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:19,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:19,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:42:19,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:42:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:42:19,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:19,929 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-28 10:42:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:20,378 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:42:20,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:42:20,378 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-28 10:42:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:20,379 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:42:20,379 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:42:20,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:42:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:42:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:42:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:42:20,381 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:42:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:20,381 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:42:20,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:42:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:42:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:42:20,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:20,382 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-28 10:42:20,382 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:20,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-28 10:42:20,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:20,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:20,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:20,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:21,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:21,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:21,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:21,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:42:21,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:21,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:21,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:21,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:42:21,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:42:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:42:21,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:21,320 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-28 10:42:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:21,928 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:42:21,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:42:21,928 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-28 10:42:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:21,929 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:42:21,929 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:42:21,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:42:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:42:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:42:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:42:21,931 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:42:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:21,931 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:42:21,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:42:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:42:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:42:21,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:21,932 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-28 10:42:21,932 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:21,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-28 10:42:21,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:21,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:21,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:21,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:21,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:22,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:22,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:22,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:22,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:22,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:22,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:23,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:23,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:42:23,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:42:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:42:23,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:23,113 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-28 10:42:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:23,653 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:42:23,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:42:23,654 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-28 10:42:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:23,654 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:42:23,654 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:42:23,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:42:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:42:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:42:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:42:23,657 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:42:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:23,657 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:42:23,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:42:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:42:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:42:23,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:23,658 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-28 10:42:23,658 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:23,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-28 10:42:23,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:23,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:23,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:24,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:24,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:24,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:24,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:42:24,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:24,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:24,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:24,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:42:24,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:42:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:42:24,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:24,397 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-28 10:42:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:25,077 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:42:25,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:42:25,077 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-28 10:42:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:25,078 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:42:25,078 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:42:25,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:42:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:42:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:42:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:42:25,080 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:42:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:25,080 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:42:25,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:42:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:42:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:42:25,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:25,081 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-28 10:42:25,081 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:25,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-28 10:42:25,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:25,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:25,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:25,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:25,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:25,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:25,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:25,592 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:25,667 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:42:25,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:25,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:26,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:26,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:42:26,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:42:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:42:26,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:26,037 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-28 10:42:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:26,652 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:42:26,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:42:26,653 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-28 10:42:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:26,653 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:42:26,653 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:42:26,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:42:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:42:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:42:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:42:26,656 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:42:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:26,656 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:42:26,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:42:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:42:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:42:26,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:26,657 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-28 10:42:26,657 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:26,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-28 10:42:26,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:26,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:26,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:26,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:26,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:27,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:27,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:27,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:27,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:27,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:27,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:42:27,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:42:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:42:27,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:27,353 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-28 10:42:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:27,864 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:42:27,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:42:27,865 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-28 10:42:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:27,865 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:42:27,866 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:42:27,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:42:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:42:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:42:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:42:27,868 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:42:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:27,868 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:42:27,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:42:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:42:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:42:27,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:27,869 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-28 10:42:27,869 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:27,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-28 10:42:27,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:27,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:27,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:28,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:28,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:28,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:28,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:28,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:28,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:28,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:28,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:42:28,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:42:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:42:28,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:28,569 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-28 10:42:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:29,093 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:42:29,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:42:29,093 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-28 10:42:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:29,093 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:42:29,094 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:42:29,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:42:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:42:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:42:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:42:29,096 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:42:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:29,096 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:42:29,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:42:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:42:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:42:29,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:29,097 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-28 10:42:29,098 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:29,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-28 10:42:29,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:29,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:29,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:29,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:29,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:29,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:29,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:29,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:29,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:42:29,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:29,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:29,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:29,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:42:29,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:42:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:42:29,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:29,971 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-28 10:42:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:30,488 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:42:30,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:42:30,489 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-28 10:42:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:30,489 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:42:30,489 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:42:30,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:42:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:42:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:42:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:42:30,492 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:42:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:30,492 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:42:30,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:42:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:42:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:42:30,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:30,493 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-28 10:42:30,493 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:30,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-28 10:42:30,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:30,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:30,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:30,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:30,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:31,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:31,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:31,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:31,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:31,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:31,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:31,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:31,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:42:31,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:42:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:42:31,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:31,516 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-28 10:42:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:32,065 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:42:32,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:42:32,065 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-28 10:42:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:32,065 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:42:32,066 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:42:32,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:42:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:42:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:42:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:42:32,068 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:42:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:32,068 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:42:32,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:42:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:42:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:42:32,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:32,068 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-28 10:42:32,069 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:32,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-28 10:42:32,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:32,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:32,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:32,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:32,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:32,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:32,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:32,545 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:32,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:42:32,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:32,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:32,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:32,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:42:32,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:42:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:42:32,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:32,989 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-28 10:42:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:33,523 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:42:33,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:42:33,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-28 10:42:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:33,524 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:42:33,524 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:42:33,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:42:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:42:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:42:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:42:33,526 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:42:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:33,526 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:42:33,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:42:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:42:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:42:33,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:33,527 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-28 10:42:33,527 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:33,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-28 10:42:33,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:33,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:33,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:33,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:33,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:34,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:34,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:34,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:34,137 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:42:34,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:34,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:34,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:34,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:42:34,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:42:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:42:34,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:34,344 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-28 10:42:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:34,924 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:42:34,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:42:34,924 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-28 10:42:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:34,925 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:42:34,925 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:42:34,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:42:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:42:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:42:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:42:34,928 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:42:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:34,928 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:42:34,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:42:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:42:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:42:34,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:34,929 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-28 10:42:34,929 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:34,929 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-28 10:42:34,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:34,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:34,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:34,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:34,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:35,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:35,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:35,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:35,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:35,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:35,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:42:35,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:42:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:42:35,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:35,700 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-28 10:42:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:36,558 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:42:36,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:42:36,558 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-28 10:42:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:36,559 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:42:36,559 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:42:36,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:42:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:42:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:42:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:42:36,561 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:42:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:36,561 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:42:36,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:42:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:42:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:42:36,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:36,562 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-28 10:42:36,562 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:36,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-28 10:42:36,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:36,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:36,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:36,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:36,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:37,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:37,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:37,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:37,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:37,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:37,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:37,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:37,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:42:37,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:42:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:42:37,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:37,357 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-28 10:42:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:38,209 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:42:38,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:42:38,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-28 10:42:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:38,209 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:42:38,210 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:42:38,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:42:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:42:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:42:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:42:38,212 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:42:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:38,212 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:42:38,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:42:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:42:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:42:38,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:38,212 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-28 10:42:38,213 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:38,213 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-28 10:42:38,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:38,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:38,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:38,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:38,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:38,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:38,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:38,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:38,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:42:38,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:38,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:39,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:39,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:42:39,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:42:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:42:39,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:39,029 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-28 10:42:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:39,647 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:42:39,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:42:39,647 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-28 10:42:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:39,648 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:42:39,648 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:42:39,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:42:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:42:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:42:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:42:39,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:42:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:39,650 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:42:39,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:42:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:42:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:42:39,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:39,651 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-28 10:42:39,651 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:39,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-28 10:42:39,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:39,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:39,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:39,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:39,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:40,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:40,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:40,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:40,235 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:40,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:40,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:40,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:40,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:42:40,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:42:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:42:40,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:40,505 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-28 10:42:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:41,585 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:42:41,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:42:41,586 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-28 10:42:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:41,586 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:42:41,586 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:42:41,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:42:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:42:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:42:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:42:41,588 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:42:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:41,589 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:42:41,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:42:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:42:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:42:41,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:41,589 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-28 10:42:41,590 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:41,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:41,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-28 10:42:41,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:41,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:42,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:42,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:42,214 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:42:42,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:42,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:42,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:42:42,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:42:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:42:42,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:42,432 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-28 10:42:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:43,093 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:42:43,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:42:43,094 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-28 10:42:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:43,094 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:42:43,094 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:42:43,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:43,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:42:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:42:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:42:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:42:43,097 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:42:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:43,097 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:42:43,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:42:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:42:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:42:43,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:43,098 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-28 10:42:43,098 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:43,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-28 10:42:43,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:43,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:43,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:43,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:43,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:43,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:43,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:42:43,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:43,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:43,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:42:43,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:42:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:42:43,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:43,996 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-28 10:42:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:44,638 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:42:44,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:42:44,638 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-28 10:42:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:44,639 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:42:44,639 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:42:44,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:42:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:42:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:42:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:42:44,642 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:42:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:44,642 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:42:44,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:42:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:42:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:42:44,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:44,643 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-28 10:42:44,643 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:44,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:44,643 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-28 10:42:44,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:44,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:44,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:44,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:45,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:45,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:45,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:45,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:42:45,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:42:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:42:45,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:45,482 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-28 10:42:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:46,605 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:42:46,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:42:46,605 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-28 10:42:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:46,606 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:42:46,606 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:42:46,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:42:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:42:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:42:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:42:46,608 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:42:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:46,608 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:42:46,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:42:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:42:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:42:46,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:46,609 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-28 10:42:46,609 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:46,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-28 10:42:46,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:46,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:47,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:47,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:47,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:47,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:47,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:47,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:42:47,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:42:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:42:47,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:47,458 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-28 10:42:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:48,403 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:42:48,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:42:48,403 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-28 10:42:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:48,404 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:42:48,404 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:42:48,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:42:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:42:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:42:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:42:48,406 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:42:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:48,406 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:42:48,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:42:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:42:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:42:48,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:48,407 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-28 10:42:48,407 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:48,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-28 10:42:48,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:48,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:48,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:48,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:49,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:42:49,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:49,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:49,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:42:49,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:42:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:42:49,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:49,310 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-28 10:42:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:50,223 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-28 10:42:50,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:42:50,223 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-28 10:42:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:50,224 INFO L225 Difference]: With dead ends: 106 [2018-09-28 10:42:50,224 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:42:50,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:42:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:42:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:42:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:42:50,226 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:42:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:50,226 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:42:50,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:42:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:42:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:42:50,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:50,227 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-28 10:42:50,227 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:50,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-28 10:42:50,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:50,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:50,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:50,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:50,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:50,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:50,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:50,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:50,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:50,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:51,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:42:51,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:42:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:42:51,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:51,111 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-28 10:42:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:52,121 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:42:52,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:42:52,122 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-28 10:42:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:52,122 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:42:52,122 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:42:52,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:42:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:42:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:42:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:42:52,130 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-28 10:42:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:52,132 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:42:52,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:42:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:42:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:42:52,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:52,133 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-28 10:42:52,133 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:52,133 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-28 10:42:52,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:52,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:52,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:52,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:52,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:52,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:52,811 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:52,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-28 10:42:52,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:52,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:53,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:42:53,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:42:53,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:42:53,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,169 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-28 10:42:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:54,090 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-28 10:42:54,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:42:54,090 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-28 10:42:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:54,091 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:42:54,091 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:42:54,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:42:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:42:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:42:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:42:54,100 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-28 10:42:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:54,100 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:42:54,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:42:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:42:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:42:54,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:54,101 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-28 10:42:54,101 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:54,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-28 10:42:54,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:54,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:54,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:54,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:54,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:54,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:54,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-28 10:42:54,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:54,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:55,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:42:55,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:42:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:42:55,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:55,101 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-28 10:42:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:56,098 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:42:56,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:42:56,099 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-28 10:42:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:56,099 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:42:56,099 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:42:56,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:42:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:42:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:42:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:42:56,102 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-28 10:42:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:56,102 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:42:56,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:42:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:42:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:42:56,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:56,103 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-28 10:42:56,104 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:56,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-28 10:42:56,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:56,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:56,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:56,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:57,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:57,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:42:57,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:42:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:42:57,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:57,314 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-28 10:42:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:58,349 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-28 10:42:58,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:42:58,349 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-28 10:42:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:58,350 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:42:58,350 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:42:58,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:42:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:42:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:42:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:42:58,352 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-28 10:42:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:58,353 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:42:58,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:42:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:42:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:42:58,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:58,353 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-28 10:42:58,353 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:58,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-28 10:42:58,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:58,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:59,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:59,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:59,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:59,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:59,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:59,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:42:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:42:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:42:59,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:59,432 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-28 10:43:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:00,260 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:43:00,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:43:00,261 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-28 10:43:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:00,261 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:43:00,261 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:43:00,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:43:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:43:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:43:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:43:00,263 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-28 10:43:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:00,264 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:43:00,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:43:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:43:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:43:00,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:00,264 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-28 10:43:00,264 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:00,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-28 10:43:00,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:00,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:00,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:00,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:00,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:00,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:00,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:01,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-28 10:43:01,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:01,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:01,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:01,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:43:01,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:43:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:43:01,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:01,313 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-28 10:43:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:02,191 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-28 10:43:02,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:43:02,192 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-28 10:43:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:02,192 INFO L225 Difference]: With dead ends: 112 [2018-09-28 10:43:02,192 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:43:02,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:43:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:43:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:43:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:43:02,195 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-28 10:43:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:02,195 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:43:02,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:43:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:43:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:43:02,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:02,196 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-28 10:43:02,196 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:02,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-28 10:43:02,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:02,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:02,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:02,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:02,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:02,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:02,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:02,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:02,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:03,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:03,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:43:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:43:03,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:43:03,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:03,145 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-28 10:43:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:04,286 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:43:04,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:43:04,286 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-28 10:43:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:04,287 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:43:04,287 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:43:04,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:43:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:43:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:43:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:43:04,290 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-28 10:43:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:04,290 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:43:04,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:43:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:43:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:43:04,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:04,290 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-28 10:43:04,291 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:04,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-28 10:43:04,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:04,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:04,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:04,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:04,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:04,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:05,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:43:05,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:05,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:05,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:43:05,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:43:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:43:05,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:05,315 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-28 10:43:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:06,324 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-28 10:43:06,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:43:06,324 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-28 10:43:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:06,324 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:43:06,324 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:43:06,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:43:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:43:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:43:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:43:06,326 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-28 10:43:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:06,327 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:43:06,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:43:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:43:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:43:06,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:06,327 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-28 10:43:06,328 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:06,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-09-28 10:43:06,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:06,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:06,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:06,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:06,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:07,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:07,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:07,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:43:07,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:07,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:07,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:43:07,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:43:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:43:07,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:07,575 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-28 10:43:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:08,728 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:43:08,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:43:08,729 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-28 10:43:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:08,729 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:43:08,729 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:43:08,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:43:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:43:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:43:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:43:08,731 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-28 10:43:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:08,731 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:43:08,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:43:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:43:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:43:08,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:08,732 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-28 10:43:08,732 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:08,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:08,732 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-09-28 10:43:08,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:08,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:08,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:08,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:09,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:09,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:09,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:09,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:09,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:09,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:43:09,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:43:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:43:09,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:09,705 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-28 10:43:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:10,757 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-28 10:43:10,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:43:10,757 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-28 10:43:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:10,757 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:43:10,757 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:43:10,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:43:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:43:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:43:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:43:10,760 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-28 10:43:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:10,760 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:43:10,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:43:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:43:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:43:10,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:10,761 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-28 10:43:10,761 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:10,762 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-09-28 10:43:10,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:10,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:10,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:10,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:11,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:11,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:11,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:11,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:11,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:11,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-28 10:43:11,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:43:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:43:11,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:11,765 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-28 10:43:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:12,966 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:43:12,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:43:12,966 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-28 10:43:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:12,967 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:43:12,967 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:43:12,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:43:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:43:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:43:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:43:12,969 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-28 10:43:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:12,970 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:43:12,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:43:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:43:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:43:12,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:12,970 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-28 10:43:12,971 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:12,971 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:12,971 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-09-28 10:43:12,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:12,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:12,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:12,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:12,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:13,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:13,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:13,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:13,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-28 10:43:13,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:13,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:14,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:14,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-28 10:43:14,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:43:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:43:14,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:14,128 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-28 10:43:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:15,025 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-28 10:43:15,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-28 10:43:15,026 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-28 10:43:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:15,026 INFO L225 Difference]: With dead ends: 118 [2018-09-28 10:43:15,026 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:43:15,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:43:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:43:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:43:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:43:15,028 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-28 10:43:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:15,029 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:43:15,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:43:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:43:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:43:15,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:15,029 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-28 10:43:15,030 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:15,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-09-28 10:43:15,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:15,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:15,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:15,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:15,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:15,793 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:15,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:15,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:16,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:16,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-28 10:43:16,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-28 10:43:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-28 10:43:16,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:16,165 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-28 10:43:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:17,463 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:43:17,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-28 10:43:17,464 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-28 10:43:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:17,464 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:43:17,464 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:43:17,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:43:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:43:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:43:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:43:17,466 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-28 10:43:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:17,466 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:43:17,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-28 10:43:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:43:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:43:17,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:17,467 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-28 10:43:17,467 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:17,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-09-28 10:43:17,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:17,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:17,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:17,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:17,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:18,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:18,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:18,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:18,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-28 10:43:18,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:18,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:18,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:18,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-28 10:43:18,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:43:18,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:43:18,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:18,789 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-28 10:43:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:19,821 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-28 10:43:19,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-28 10:43:19,822 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-28 10:43:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:19,822 INFO L225 Difference]: With dead ends: 120 [2018-09-28 10:43:19,822 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:43:19,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:43:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:43:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:43:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-28 10:43:19,825 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-28 10:43:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:19,825 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-28 10:43:19,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:43:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-28 10:43:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-28 10:43:19,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:19,826 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-28 10:43:19,826 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:19,826 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-09-28 10:43:19,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:19,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:19,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:19,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:20,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:20,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:20,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-28 10:43:20,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:20,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:20,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-28 10:43:20,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-28 10:43:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-28 10:43:20,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:20,914 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-28 10:43:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:22,129 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:43:22,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-28 10:43:22,129 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-28 10:43:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:22,129 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:43:22,130 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:43:22,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:43:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:43:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:43:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-28 10:43:22,132 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-28 10:43:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:22,135 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-28 10:43:22,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-28 10:43:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-28 10:43:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:43:22,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:22,136 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-28 10:43:22,136 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:22,136 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-09-28 10:43:22,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:22,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:22,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:22,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:22,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:22,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:22,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:22,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:23,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:23,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-28 10:43:23,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:43:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:43:23,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:23,283 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-28 10:43:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:24,208 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-28 10:43:24,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-28 10:43:24,209 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-28 10:43:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:24,209 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:43:24,209 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 10:43:24,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 10:43:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-28 10:43:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-28 10:43:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-28 10:43:24,212 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-28 10:43:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:24,212 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-28 10:43:24,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:43:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-28 10:43:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:43:24,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:24,212 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-28 10:43:24,212 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:24,213 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-09-28 10:43:24,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:24,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:24,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:24,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:24,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:24,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:24,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:25,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:25,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:25,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:25,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-28 10:43:25,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-28 10:43:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-28 10:43:25,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:25,286 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-28 10:43:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:26,328 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:43:26,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-28 10:43:26,328 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-28 10:43:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:26,328 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:43:26,328 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:43:26,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:43:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:43:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:43:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-28 10:43:26,331 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-28 10:43:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:26,331 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-28 10:43:26,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-28 10:43:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-28 10:43:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:43:26,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:26,331 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-28 10:43:26,332 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:26,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-09-28 10:43:26,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:26,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:26,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:26,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:26,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:27,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:27,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:27,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:27,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-28 10:43:27,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:27,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:27,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:27,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-28 10:43:27,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:43:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:43:27,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:27,547 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-28 10:43:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:28,679 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-28 10:43:28,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-28 10:43:28,679 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-28 10:43:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:28,679 INFO L225 Difference]: With dead ends: 124 [2018-09-28 10:43:28,680 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:43:28,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:43:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:43:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:43:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-28 10:43:28,682 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-28 10:43:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:28,683 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-28 10:43:28,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:43:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-28 10:43:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-28 10:43:28,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:28,683 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-28 10:43:28,683 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:28,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-09-28 10:43:28,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:28,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:28,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:28,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:29,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:29,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:29,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:29,522 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:29,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:29,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:29,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:29,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-28 10:43:29,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-28 10:43:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-28 10:43:29,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:29,814 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-28 10:43:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:30,948 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:43:30,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 10:43:30,948 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-28 10:43:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:30,948 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:43:30,948 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:43:30,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:43:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:43:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:43:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-28 10:43:30,951 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-28 10:43:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:30,951 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-28 10:43:30,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-28 10:43:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-28 10:43:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:43:30,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:30,952 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-28 10:43:30,952 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:30,953 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-09-28 10:43:30,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:30,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:30,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:30,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:31,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:31,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:31,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:31,867 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-28 10:43:31,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:31,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:32,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:32,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-28 10:43:32,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:43:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:43:32,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:32,155 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-28 10:43:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:33,499 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-28 10:43:33,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-28 10:43:33,499 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-28 10:43:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:33,500 INFO L225 Difference]: With dead ends: 126 [2018-09-28 10:43:33,500 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:43:33,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:43:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:43:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:43:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-28 10:43:33,503 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-28 10:43:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:33,503 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-28 10:43:33,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:43:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-28 10:43:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-28 10:43:33,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:33,504 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-28 10:43:33,504 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:33,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-09-28 10:43:33,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:33,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:33,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:33,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:34,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:34,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:34,319 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:34,441 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:43:34,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:34,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:34,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:34,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-28 10:43:34,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-28 10:43:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-28 10:43:34,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:34,731 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-28 10:43:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:36,115 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:43:36,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-28 10:43:36,116 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-28 10:43:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:36,116 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:43:36,116 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:43:36,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:43:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:43:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:43:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-28 10:43:36,129 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-28 10:43:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:36,129 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-28 10:43:36,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-28 10:43:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-28 10:43:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:43:36,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:36,130 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-28 10:43:36,130 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:36,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-09-28 10:43:36,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:36,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:36,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:36,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:36,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:36,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:36,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:36,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:37,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:37,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-28 10:43:37,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:43:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:43:37,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:37,265 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-28 10:43:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:38,567 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-28 10:43:38,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-28 10:43:38,568 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-28 10:43:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:38,568 INFO L225 Difference]: With dead ends: 128 [2018-09-28 10:43:38,568 INFO L226 Difference]: Without dead ends: 126 [2018-09-28 10:43:38,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-28 10:43:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-28 10:43:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-28 10:43:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-28 10:43:38,571 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-28 10:43:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:38,571 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-28 10:43:38,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:43:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-28 10:43:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:43:38,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:38,572 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-28 10:43:38,572 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:38,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-09-28 10:43:38,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:38,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:38,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:38,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:38,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:39,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:39,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:39,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:39,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:39,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:39,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:39,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-28 10:43:39,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-28 10:43:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-28 10:43:39,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:39,695 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-28 10:43:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:40,718 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:43:40,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-28 10:43:40,718 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-28 10:43:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:40,718 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:43:40,718 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:43:40,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:43:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:43:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:43:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-28 10:43:40,721 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-28 10:43:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:40,722 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-28 10:43:40,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-28 10:43:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-28 10:43:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:43:40,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:40,722 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-28 10:43:40,723 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:40,723 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:40,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-09-28 10:43:40,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:40,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:40,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:40,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:41,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:41,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:41,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:41,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-28 10:43:41,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:41,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:41,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:41,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-28 10:43:41,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:43:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:43:41,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:41,933 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-28 10:43:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:43,030 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-28 10:43:43,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-28 10:43:43,030 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-28 10:43:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:43,030 INFO L225 Difference]: With dead ends: 130 [2018-09-28 10:43:43,030 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:43:43,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:43:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:43:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:43:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-28 10:43:43,032 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-28 10:43:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:43,033 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-28 10:43:43,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:43:43,033 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-28 10:43:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-28 10:43:43,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:43,033 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-28 10:43:43,033 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:43,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-09-28 10:43:43,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:43,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:43,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:43,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:43,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:43,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:43,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:43,890 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:43,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:43,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:44,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:44,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-28 10:43:44,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-28 10:43:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-28 10:43:44,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:44,188 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-28 10:43:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:45,475 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:43:45,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-28 10:43:45,475 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-28 10:43:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:45,475 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:43:45,475 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:43:45,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:43:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:43:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:43:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-28 10:43:45,478 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-28 10:43:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:45,478 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-28 10:43:45,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-28 10:43:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-28 10:43:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:43:45,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:45,479 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-28 10:43:45,479 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:45,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-09-28 10:43:45,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:45,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:45,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:45,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:45,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:46,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:46,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:46,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:46,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-28 10:43:46,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:46,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:46,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:46,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-28 10:43:46,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:43:46,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:43:46,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:46,703 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-28 10:43:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:48,042 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-28 10:43:48,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-28 10:43:48,042 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-28 10:43:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:48,043 INFO L225 Difference]: With dead ends: 132 [2018-09-28 10:43:48,043 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:43:48,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:43:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:43:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:43:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-28 10:43:48,046 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-28 10:43:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:48,046 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-28 10:43:48,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:43:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-28 10:43:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-28 10:43:48,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:48,047 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-28 10:43:48,047 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:48,047 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-09-28 10:43:48,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:48,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:48,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:48,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:48,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:48,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:48,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:48,981 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-28 10:43:48,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:48,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:49,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:49,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-28 10:43:49,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-28 10:43:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-28 10:43:49,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:49,274 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-28 10:43:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:50,658 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:43:50,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-28 10:43:50,659 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-28 10:43:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:50,659 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:43:50,659 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:43:50,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:43:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:43:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:43:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-28 10:43:50,661 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-28 10:43:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:50,661 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-28 10:43:50,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-28 10:43:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-28 10:43:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:43:50,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:50,662 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-28 10:43:50,662 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:50,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-09-28 10:43:50,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:50,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:50,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:50,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:50,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:51,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:51,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:51,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:51,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:51,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:51,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-28 10:43:51,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:43:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:43:51,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:51,854 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-28 10:43:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:53,174 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-28 10:43:53,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-28 10:43:53,175 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-28 10:43:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:53,175 INFO L225 Difference]: With dead ends: 134 [2018-09-28 10:43:53,175 INFO L226 Difference]: Without dead ends: 132 [2018-09-28 10:43:53,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-28 10:43:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-28 10:43:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-28 10:43:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-28 10:43:53,178 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-28 10:43:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:53,179 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-28 10:43:53,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:43:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-28 10:43:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:43:53,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:53,180 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-28 10:43:53,180 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:53,180 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-09-28 10:43:53,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:53,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:54,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:54,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:54,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:54,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:54,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:54,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:54,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:54,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-28 10:43:54,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-28 10:43:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-28 10:43:54,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:54,401 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-28 10:43:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:55,674 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:43:55,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 10:43:55,674 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-28 10:43:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:55,674 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:43:55,674 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:43:55,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:43:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:43:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:43:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-28 10:43:55,677 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-28 10:43:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:55,678 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-28 10:43:55,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-28 10:43:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-28 10:43:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:43:55,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:55,678 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-28 10:43:55,679 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:55,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-09-28 10:43:55,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:55,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:55,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:55,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:56,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:56,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:56,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:56,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-28 10:43:56,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:56,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:57,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:57,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-28 10:43:57,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:43:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:43:57,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:57,006 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-28 10:43:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:58,216 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-28 10:43:58,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-28 10:43:58,216 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-28 10:43:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:58,217 INFO L225 Difference]: With dead ends: 136 [2018-09-28 10:43:58,217 INFO L226 Difference]: Without dead ends: 134 [2018-09-28 10:43:58,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-28 10:43:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-28 10:43:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-28 10:43:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-28 10:43:58,220 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-28 10:43:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:58,220 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-28 10:43:58,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:43:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-28 10:43:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-28 10:43:58,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:58,221 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-28 10:43:58,221 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:58,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-09-28 10:43:58,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:58,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:58,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:59,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:59,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:59,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:59,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:59,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:59,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:59,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:59,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-28 10:43:59,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-28 10:43:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-28 10:43:59,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:59,513 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-28 10:44:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:00,707 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:44:00,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-28 10:44:00,707 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-28 10:44:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:00,707 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:44:00,707 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:44:00,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:44:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:44:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:44:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-28 10:44:00,710 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-28 10:44:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:00,710 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-28 10:44:00,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-28 10:44:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-28 10:44:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:44:00,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:00,711 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-28 10:44:00,711 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:00,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-09-28 10:44:00,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:00,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:00,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:00,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:00,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:01,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:01,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:01,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:01,730 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-28 10:44:01,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:01,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:02,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:02,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-28 10:44:02,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-28 10:44:02,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-28 10:44:02,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:02,040 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-28 10:44:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:03,481 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-28 10:44:03,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-28 10:44:03,481 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-28 10:44:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:03,482 INFO L225 Difference]: With dead ends: 138 [2018-09-28 10:44:03,482 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:44:03,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:44:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:44:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:44:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-28 10:44:03,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-28 10:44:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:03,484 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-28 10:44:03,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-28 10:44:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-28 10:44:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-28 10:44:03,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:03,485 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-28 10:44:03,485 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:03,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-09-28 10:44:03,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:03,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:03,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:03,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:03,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:04,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:04,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:04,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:04,495 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:44:04,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:04,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:04,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:04,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-28 10:44:04,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-28 10:44:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-28 10:44:04,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:04,802 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-28 10:44:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:06,259 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:44:06,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-28 10:44:06,260 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-28 10:44:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:06,260 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:44:06,260 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:44:06,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:44:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:44:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:44:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-28 10:44:06,262 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-28 10:44:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:06,263 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-28 10:44:06,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-28 10:44:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-28 10:44:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:44:06,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:06,263 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-28 10:44:06,263 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:06,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-09-28 10:44:06,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:06,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:06,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:06,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:06,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:07,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:07,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:07,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:07,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:07,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:07,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-28 10:44:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-28 10:44:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-28 10:44:07,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:07,555 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-28 10:44:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:09,103 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-28 10:44:09,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-28 10:44:09,103 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-28 10:44:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:09,103 INFO L225 Difference]: With dead ends: 140 [2018-09-28 10:44:09,103 INFO L226 Difference]: Without dead ends: 138 [2018-09-28 10:44:09,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-28 10:44:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-28 10:44:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-28 10:44:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-28 10:44:09,105 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-28 10:44:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:09,106 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-28 10:44:09,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-28 10:44:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-28 10:44:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:44:09,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:09,106 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-28 10:44:09,106 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:09,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-09-28 10:44:09,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:09,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:09,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:09,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:09,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:10,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:10,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:10,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:10,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:10,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-28 10:44:10,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-28 10:44:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-28 10:44:10,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:10,396 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-28 10:44:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:11,666 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:44:11,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-28 10:44:11,666 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-28 10:44:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:11,666 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:44:11,666 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:44:11,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:44:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:44:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:44:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-28 10:44:11,668 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-28 10:44:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:11,669 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-28 10:44:11,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-28 10:44:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-28 10:44:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:44:11,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:11,670 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-28 10:44:11,670 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:11,670 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-09-28 10:44:11,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:11,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:11,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:11,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:11,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:12,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:12,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:12,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:12,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-28 10:44:12,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:12,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:13,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:13,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-28 10:44:13,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-28 10:44:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-28 10:44:13,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:13,097 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-28 10:44:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:14,828 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-28 10:44:14,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-28 10:44:14,829 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-28 10:44:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:14,829 INFO L225 Difference]: With dead ends: 142 [2018-09-28 10:44:14,829 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:44:14,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:44:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:44:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:44:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-28 10:44:14,832 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-28 10:44:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:14,832 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-28 10:44:14,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-28 10:44:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-28 10:44:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-28 10:44:14,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:14,833 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-28 10:44:14,833 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:14,833 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:14,833 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-09-28 10:44:14,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:14,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:14,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:14,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:14,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:15,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:15,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:15,764 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:15,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:15,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:15,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:16,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:16,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-28 10:44:16,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-28 10:44:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-28 10:44:16,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:16,194 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-28 10:44:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:17,729 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:44:17,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-28 10:44:17,729 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-28 10:44:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:17,730 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:44:17,730 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:44:17,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:44:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:44:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:44:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-28 10:44:17,732 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-28 10:44:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:17,733 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-28 10:44:17,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-28 10:44:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-28 10:44:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:44:17,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:17,733 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-28 10:44:17,734 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:17,734 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-09-28 10:44:17,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:17,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:17,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:17,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:17,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:18,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:18,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:18,739 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:18,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-28 10:44:18,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:18,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:19,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:19,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-28 10:44:19,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-28 10:44:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-28 10:44:19,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:19,228 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-28 10:44:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:20,889 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-28 10:44:20,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-28 10:44:20,889 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-28 10:44:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:20,890 INFO L225 Difference]: With dead ends: 144 [2018-09-28 10:44:20,890 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:44:20,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:44:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:44:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:44:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-28 10:44:20,892 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-28 10:44:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:20,892 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-28 10:44:20,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-28 10:44:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-28 10:44:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-28 10:44:20,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:20,893 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-28 10:44:20,893 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:20,893 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-09-28 10:44:20,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:20,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:20,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:20,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:20,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:21,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:21,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:21,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:22,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-28 10:44:22,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:22,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:22,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:22,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-28 10:44:22,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-28 10:44:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-28 10:44:22,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:22,332 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-28 10:44:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:23,902 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:44:23,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-28 10:44:23,902 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-28 10:44:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:23,902 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:44:23,902 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:44:23,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:44:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:44:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:44:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-28 10:44:23,905 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-28 10:44:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:23,905 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-28 10:44:23,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-28 10:44:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-28 10:44:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:44:23,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:23,906 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-28 10:44:23,906 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:23,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-09-28 10:44:23,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:23,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:23,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:23,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:23,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:24,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:24,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:24,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:24,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:25,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:25,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-28 10:44:25,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-28 10:44:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-28 10:44:25,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:25,286 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-28 10:44:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:26,834 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-28 10:44:26,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-28 10:44:26,835 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-28 10:44:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:26,835 INFO L225 Difference]: With dead ends: 146 [2018-09-28 10:44:26,835 INFO L226 Difference]: Without dead ends: 144 [2018-09-28 10:44:26,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-28 10:44:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-28 10:44:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-28 10:44:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-28 10:44:26,837 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-28 10:44:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:26,838 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-28 10:44:26,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-28 10:44:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-28 10:44:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:44:26,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:26,838 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-28 10:44:26,838 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:26,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-09-28 10:44:26,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:26,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:26,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:27,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:27,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:27,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:27,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:27,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:27,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:28,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:28,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-28 10:44:28,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-28 10:44:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-28 10:44:28,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:28,232 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-28 10:44:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:30,030 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:44:30,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-28 10:44:30,030 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-28 10:44:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:30,030 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:44:30,030 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:44:30,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:44:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:44:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:44:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-28 10:44:30,033 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-28 10:44:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:30,034 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-28 10:44:30,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-28 10:44:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-28 10:44:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:44:30,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:30,034 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-28 10:44:30,034 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:30,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-09-28 10:44:30,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:30,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:30,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:31,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:31,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:31,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:31,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-28 10:44:31,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:31,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:31,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:31,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-28 10:44:31,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-28 10:44:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-28 10:44:31,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:31,540 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-28 10:44:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:33,386 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-28 10:44:33,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-28 10:44:33,386 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-28 10:44:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:33,387 INFO L225 Difference]: With dead ends: 148 [2018-09-28 10:44:33,387 INFO L226 Difference]: Without dead ends: 146 [2018-09-28 10:44:33,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-28 10:44:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-28 10:44:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-28 10:44:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-28 10:44:33,389 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-28 10:44:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:33,390 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-28 10:44:33,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-28 10:44:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-28 10:44:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-28 10:44:33,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:33,391 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-28 10:44:33,391 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:33,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-09-28 10:44:33,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:33,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:34,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:34,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:34,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:34,520 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:34,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:34,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:34,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:34,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-28 10:44:34,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-28 10:44:34,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-28 10:44:34,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:34,914 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-28 10:44:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:36,380 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:44:36,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-28 10:44:36,381 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-28 10:44:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:36,381 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:44:36,381 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:44:36,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:44:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:44:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:44:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-28 10:44:36,383 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-28 10:44:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:36,384 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-28 10:44:36,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-28 10:44:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-28 10:44:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:44:36,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:36,384 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-28 10:44:36,385 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:36,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-09-28 10:44:36,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:36,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:36,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:36,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:36,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:37,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:37,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:37,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:37,580 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-28 10:44:37,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:37,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:37,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:37,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-28 10:44:37,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-28 10:44:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-28 10:44:37,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:37,923 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-28 10:44:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:39,871 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-28 10:44:39,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-28 10:44:39,871 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-28 10:44:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:39,871 INFO L225 Difference]: With dead ends: 150 [2018-09-28 10:44:39,871 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:44:39,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:44:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:44:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:44:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-28 10:44:39,873 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-28 10:44:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:39,874 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-28 10:44:39,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-28 10:44:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-28 10:44:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-28 10:44:39,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:39,874 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-28 10:44:39,874 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:39,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-09-28 10:44:39,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:39,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:39,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:39,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:39,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:40,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:40,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:40,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:41,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:44:41,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:41,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:41,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:41,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-28 10:44:41,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-28 10:44:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-28 10:44:41,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:41,415 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-28 10:44:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:43,266 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:44:43,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-28 10:44:43,266 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-28 10:44:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:43,266 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:44:43,267 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:44:43,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:44:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:44:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:44:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-28 10:44:43,268 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-28 10:44:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:43,269 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-28 10:44:43,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-28 10:44:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-28 10:44:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:44:43,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:43,269 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-28 10:44:43,269 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:43,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-09-28 10:44:43,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:43,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:43,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:43,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:43,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:44,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:44,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:44,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:44,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:44,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:44,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-28 10:44:44,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-28 10:44:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-28 10:44:44,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:44,836 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-28 10:44:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:46,314 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-28 10:44:46,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-28 10:44:46,314 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-28 10:44:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:46,315 INFO L225 Difference]: With dead ends: 152 [2018-09-28 10:44:46,315 INFO L226 Difference]: Without dead ends: 150 [2018-09-28 10:44:46,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-28 10:44:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-28 10:44:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-28 10:44:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-28 10:44:46,317 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-28 10:44:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:46,317 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-28 10:44:46,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-28 10:44:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-28 10:44:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:44:46,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:46,318 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-28 10:44:46,318 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:46,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-09-28 10:44:46,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:46,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:46,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:46,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:46,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:47,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:47,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:47,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:47,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:47,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:47,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:47,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:47,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-28 10:44:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-28 10:44:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-28 10:44:47,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:47,814 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-28 10:44:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:49,423 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:44:49,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-28 10:44:49,423 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-28 10:44:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:49,424 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:44:49,424 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:44:49,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:44:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:44:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:44:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-28 10:44:49,426 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-28 10:44:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:49,426 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-28 10:44:49,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-28 10:44:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-28 10:44:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:44:49,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:49,427 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-28 10:44:49,427 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:49,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-09-28 10:44:49,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:49,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:49,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:49,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:49,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:50,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:50,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:50,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:50,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-28 10:44:50,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:50,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:51,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:51,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-28 10:44:51,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-28 10:44:51,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-28 10:44:51,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:51,070 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-28 10:44:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:53,014 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-28 10:44:53,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-28 10:44:53,014 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-28 10:44:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:53,014 INFO L225 Difference]: With dead ends: 154 [2018-09-28 10:44:53,014 INFO L226 Difference]: Without dead ends: 152 [2018-09-28 10:44:53,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-28 10:44:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-28 10:44:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-28 10:44:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-28 10:44:53,017 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-28 10:44:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:53,017 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-28 10:44:53,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-28 10:44:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-28 10:44:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-28 10:44:53,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:53,017 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-28 10:44:53,018 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:53,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-09-28 10:44:53,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:53,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:53,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:54,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:54,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:54,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:54,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:54,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:54,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:54,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:54,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-28 10:44:54,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-28 10:44:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-28 10:44:54,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:54,569 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-28 10:44:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:56,562 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:44:56,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-28 10:44:56,563 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-28 10:44:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:56,563 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:44:56,563 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:44:56,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:44:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:44:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:44:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-28 10:44:56,565 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-28 10:44:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:56,566 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-28 10:44:56,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-28 10:44:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-28 10:44:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:44:56,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:56,566 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-28 10:44:56,566 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:56,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-09-28 10:44:56,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:56,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:56,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:56,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:56,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:57,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:57,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:57,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:57,866 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-28 10:44:57,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:57,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:58,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:58,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-28 10:44:58,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-28 10:44:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-28 10:44:58,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:58,242 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-28 10:45:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:00,310 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-28 10:45:00,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-28 10:45:00,310 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-28 10:45:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:00,311 INFO L225 Difference]: With dead ends: 156 [2018-09-28 10:45:00,311 INFO L226 Difference]: Without dead ends: 154 [2018-09-28 10:45:00,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-28 10:45:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-28 10:45:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-28 10:45:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-28 10:45:00,314 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-28 10:45:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:00,314 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-28 10:45:00,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-28 10:45:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-28 10:45:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-28 10:45:00,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:00,315 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-28 10:45:00,315 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:00,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-09-28 10:45:00,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:00,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:00,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:00,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:00,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:01,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:01,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:01,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:45:01,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-28 10:45:01,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:01,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:01,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:02,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-28 10:45:02,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-28 10:45:02,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-28 10:45:02,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:02,003 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-09-28 10:45:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:04,160 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-28 10:45:04,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-28 10:45:04,161 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-09-28 10:45:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:04,161 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:45:04,161 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:45:04,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:45:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:45:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:45:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-28 10:45:04,163 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-09-28 10:45:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:04,163 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-28 10:45:04,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-28 10:45:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-28 10:45:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-28 10:45:04,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:04,164 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-09-28 10:45:04,164 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:04,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-09-28 10:45:04,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:04,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:04,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:05,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:05,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:05,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:05,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:05,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:05,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-28 10:45:05,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-28 10:45:05,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-28 10:45:05,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:05,757 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-09-28 10:45:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:07,786 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-09-28 10:45:07,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-28 10:45:07,786 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-28 10:45:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:07,787 INFO L225 Difference]: With dead ends: 158 [2018-09-28 10:45:07,787 INFO L226 Difference]: Without dead ends: 156 [2018-09-28 10:45:07,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-28 10:45:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-28 10:45:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-28 10:45:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-28 10:45:07,789 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-09-28 10:45:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:07,789 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-28 10:45:07,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-28 10:45:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-28 10:45:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-28 10:45:07,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:07,790 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-09-28 10:45:07,790 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:07,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-09-28 10:45:07,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:07,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:07,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:07,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:07,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:08,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:08,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:08,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:45:08,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:45:08,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:08,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:09,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:09,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-28 10:45:09,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-28 10:45:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-28 10:45:09,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:09,374 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-09-28 10:45:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:11,755 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-28 10:45:11,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-28 10:45:11,762 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-09-28 10:45:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:11,762 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:45:11,762 INFO L226 Difference]: Without dead ends: 157 [2018-09-28 10:45:11,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-28 10:45:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-28 10:45:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-28 10:45:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-28 10:45:11,765 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-09-28 10:45:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:11,765 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-28 10:45:11,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-28 10:45:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-28 10:45:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-28 10:45:11,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:11,766 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-09-28 10:45:11,766 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:11,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:11,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-09-28 10:45:11,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:11,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:11,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:11,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:11,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY Received shutdown request... [2018-09-28 10:45:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:11,857 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-09-28 10:45:11,861 INFO L168 Benchmark]: Toolchain (without parser) took 246927.39 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -50.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 193.6 MB). Peak memory consumption was 142.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:45:11,862 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:45:11,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:45:11,863 INFO L168 Benchmark]: Boogie Preprocessor took 21.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:45:11,864 INFO L168 Benchmark]: RCFGBuilder took 217.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:45:11,865 INFO L168 Benchmark]: TraceAbstraction took 246640.60 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -50.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 172.4 MB). Peak memory consumption was 121.6 MB. Max. memory is 7.1 GB. [2018-09-28 10:45:11,867 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 217.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246640.60 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -50.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 172.4 MB). Peak memory consumption was 121.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-45-11-884.csv Completed graceful shutdown