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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 11:00:24,730 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 11:00:24,732 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 11:00:24,743 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 11:00:24,776 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 11:00:24,791 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 11:00:24,791 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 11:00:24,792 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 11:00:24,792 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 11:00:24,793 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 11:00:24,793 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 11:00:24,793 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 11:00:24,793 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 11:00:24,794 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 11:00:24,794 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 11:00:24,794 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 11:00:24,794 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 11:00:24,794 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 11:00:24,795 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 11:00:24,795 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 11:00:24,795 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 11:00:24,795 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 11:00:24,795 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 11:00:24,796 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 11:00:24,796 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 11:00:24,796 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 11:00:24,796 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 11:00:24,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:00:24,796 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 11:00:24,797 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 11:00:24,797 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 11:00:24,797 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 11:00:24,797 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 11:00:24,797 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 11:00:24,798 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 11:00:24,798 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 11:00:24,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 11:00:24,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 11:00:24,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 11:00:24,887 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 11:00:24,888 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 11:00:24,889 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-30 11:00:24,890 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-30 11:00:24,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 11:00:24,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 11:00:24,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 11:00:24,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 11:00:24,949 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 11:00:24,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:24,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:24,987 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 11:00:24,988 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 11:00:24,988 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 11:00:24,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 11:00:24,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 11:00:24,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 11:00:24,991 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 11:00:25,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... [2018-09-30 11:00:25,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 11:00:25,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 11:00:25,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 11:00:25,016 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 11:00:25,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:00:25,082 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 11:00:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 11:00:25,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 11:00:25,321 INFO L345 CfgBuilder]: Using library mode [2018-09-30 11:00:25,322 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:00:25 BoogieIcfgContainer [2018-09-30 11:00:25,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 11:00:25,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 11:00:25,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 11:00:25,329 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 11:00:25,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:24" (1/2) ... [2018-09-30 11:00:25,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d85ed and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:00:25, skipping insertion in model container [2018-09-30 11:00:25,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:00:25" (2/2) ... [2018-09-30 11:00:25,335 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-30 11:00:25,346 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 11:00:25,354 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 11:00:25,413 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 11:00:25,414 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 11:00:25,414 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 11:00:25,414 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 11:00:25,414 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 11:00:25,415 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 11:00:25,415 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 11:00:25,415 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 11:00:25,415 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 11:00:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 11:00:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 11:00:25,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:25,438 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 11:00:25,439 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:25,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 11:00:25,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:25,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:25,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:25,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:25,597 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 11:00:25,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 11:00:25,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 11:00:25,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 11:00:25,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:25,616 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 11:00:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:25,850 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 11:00:25,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 11:00:25,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 11:00:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:25,864 INFO L225 Difference]: With dead ends: 11 [2018-09-30 11:00:25,864 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 11:00:25,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 11:00:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 11:00:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 11:00:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 11:00:25,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 11:00:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:25,909 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 11:00:25,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 11:00:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 11:00:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 11:00:25,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:25,910 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 11:00:25,910 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:25,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 11:00:25,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:25,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:25,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:25,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:25,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:25,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:25,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:26,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 11:00:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 11:00:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 11:00:26,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:26,136 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 11:00:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:26,335 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 11:00:26,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 11:00:26,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 11:00:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:26,338 INFO L225 Difference]: With dead ends: 9 [2018-09-30 11:00:26,338 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 11:00:26,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 11:00:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 11:00:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 11:00:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 11:00:26,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 11:00:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:26,344 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 11:00:26,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 11:00:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 11:00:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 11:00:26,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:26,345 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 11:00:26,345 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:26,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 11:00:26,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:26,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:26,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:26,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:26,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:26,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:26,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:26,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:26,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:26,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 11:00:26,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 11:00:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 11:00:26,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:26,731 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 11:00:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:26,874 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 11:00:26,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 11:00:26,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 11:00:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:26,876 INFO L225 Difference]: With dead ends: 11 [2018-09-30 11:00:26,876 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 11:00:26,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 11:00:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 11:00:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 11:00:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 11:00:26,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 11:00:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:26,882 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 11:00:26,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 11:00:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 11:00:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 11:00:26,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:26,883 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 11:00:26,884 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:26,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 11:00:26,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:26,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:26,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:26,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:26,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 11:00:26,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:26,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:27,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:27,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 11:00:27,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:27,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:27,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:27,166 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 11:00:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:27,374 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 11:00:27,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 11:00:27,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 11:00:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:27,376 INFO L225 Difference]: With dead ends: 13 [2018-09-30 11:00:27,377 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 11:00:27,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 11:00:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 11:00:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 11:00:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 11:00:27,382 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 11:00:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:27,383 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 11:00:27,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 11:00:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 11:00:27,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:27,384 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 11:00:27,384 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:27,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 11:00:27,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:27,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:27,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:27,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:27,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:27,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:27,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:27,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:27,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:27,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:27,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:28,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:28,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 11:00:28,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 11:00:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 11:00:28,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:28,014 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 11:00:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:28,281 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 11:00:28,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 11:00:28,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 11:00:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:28,282 INFO L225 Difference]: With dead ends: 15 [2018-09-30 11:00:28,282 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 11:00:28,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 11:00:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 11:00:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 11:00:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 11:00:28,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 11:00:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:28,287 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 11:00:28,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 11:00:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 11:00:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 11:00:28,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:28,288 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 11:00:28,289 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:28,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 11:00:28,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:28,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:28,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:28,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:28,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:28,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:28,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:28,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 11:00:28,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:28,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:28,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:28,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 11:00:28,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 11:00:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 11:00:28,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:28,559 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 11:00:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:28,773 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 11:00:28,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 11:00:28,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 11:00:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:28,775 INFO L225 Difference]: With dead ends: 17 [2018-09-30 11:00:28,775 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 11:00:28,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 11:00:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 11:00:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 11:00:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 11:00:28,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 11:00:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:28,780 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 11:00:28,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 11:00:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 11:00:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 11:00:28,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:28,781 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 11:00:28,782 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:28,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 11:00:28,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:28,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:28,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:28,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:28,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:28,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:28,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 11:00:28,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:28,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:29,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 11:00:29,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 11:00:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 11:00:29,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:29,246 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 11:00:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:29,358 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 11:00:29,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 11:00:29,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 11:00:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:29,359 INFO L225 Difference]: With dead ends: 19 [2018-09-30 11:00:29,359 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 11:00:29,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 11:00:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 11:00:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 11:00:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 11:00:29,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 11:00:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:29,364 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 11:00:29,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 11:00:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 11:00:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:29,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:29,365 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 11:00:29,365 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:29,366 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 11:00:29,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:29,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:29,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:29,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:29,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:29,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:29,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:29,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 11:00:29,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 11:00:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 11:00:29,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:29,617 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 11:00:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:29,770 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 11:00:29,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:29,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 11:00:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:29,772 INFO L225 Difference]: With dead ends: 21 [2018-09-30 11:00:29,772 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 11:00:29,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 11:00:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 11:00:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 11:00:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 11:00:29,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 11:00:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:29,777 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 11:00:29,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 11:00:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 11:00:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:29,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:29,778 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 11:00:29,778 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:29,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 11:00:29,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:29,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:29,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:29,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:29,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:29,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:29,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:29,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:30,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:30,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 11:00:30,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 11:00:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 11:00:30,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:30,056 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 11:00:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:30,250 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 11:00:30,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:30,252 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 11:00:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:30,253 INFO L225 Difference]: With dead ends: 23 [2018-09-30 11:00:30,253 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 11:00:30,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 11:00:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 11:00:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:00:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 11:00:30,259 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 11:00:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:30,259 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 11:00:30,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 11:00:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 11:00:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 11:00:30,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:30,260 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 11:00:30,260 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:30,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 11:00:30,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:30,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:30,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:30,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:30,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:30,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:30,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:30,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 11:00:30,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:30,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:30,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:30,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 11:00:30,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 11:00:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 11:00:30,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:30,769 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 11:00:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:31,149 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 11:00:31,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 11:00:31,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 11:00:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:31,150 INFO L225 Difference]: With dead ends: 25 [2018-09-30 11:00:31,150 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 11:00:31,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 11:00:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 11:00:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:00:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 11:00:31,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 11:00:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:31,156 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 11:00:31,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 11:00:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 11:00:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 11:00:31,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:31,157 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 11:00:31,157 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:31,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 11:00:31,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:31,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:31,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:31,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:31,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:31,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:31,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:31,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:31,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:31,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:31,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:31,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 11:00:31,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 11:00:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 11:00:31,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:31,593 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 11:00:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:31,847 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 11:00:31,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 11:00:31,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 11:00:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:31,849 INFO L225 Difference]: With dead ends: 27 [2018-09-30 11:00:31,849 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 11:00:31,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 11:00:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 11:00:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:00:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 11:00:31,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 11:00:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:31,854 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 11:00:31,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 11:00:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 11:00:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 11:00:31,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:31,855 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 11:00:31,855 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:31,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 11:00:31,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:31,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:31,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:31,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:32,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:32,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:32,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 11:00:32,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:32,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:32,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 11:00:32,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 11:00:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 11:00:32,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:32,478 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 11:00:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:32,666 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 11:00:32,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 11:00:32,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 11:00:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:32,667 INFO L225 Difference]: With dead ends: 29 [2018-09-30 11:00:32,667 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 11:00:32,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 11:00:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 11:00:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 11:00:32,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 11:00:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:32,672 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 11:00:32,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 11:00:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 11:00:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 11:00:32,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:32,673 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 11:00:32,674 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:32,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 11:00:32,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:32,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:32,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:32,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:32,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:32,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 11:00:32,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:32,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:33,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:33,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 11:00:33,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 11:00:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 11:00:33,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:33,051 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 11:00:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:33,383 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 11:00:33,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 11:00:33,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 11:00:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:33,384 INFO L225 Difference]: With dead ends: 31 [2018-09-30 11:00:33,384 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 11:00:33,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 11:00:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 11:00:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 11:00:33,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 11:00:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:33,389 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 11:00:33,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 11:00:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 11:00:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 11:00:33,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:33,390 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 11:00:33,390 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:33,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 11:00:33,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:33,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:33,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:33,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:33,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:34,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:34,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 11:00:34,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 11:00:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 11:00:34,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:34,613 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 11:00:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:34,922 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 11:00:34,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 11:00:34,922 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 11:00:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:34,923 INFO L225 Difference]: With dead ends: 33 [2018-09-30 11:00:34,923 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 11:00:34,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 11:00:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 11:00:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 11:00:34,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 11:00:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:34,930 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 11:00:34,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 11:00:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 11:00:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 11:00:34,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:34,932 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 11:00:34,932 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:34,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 11:00:34,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:34,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:34,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:34,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:34,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:35,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:35,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:35,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:35,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:35,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:35,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 11:00:35,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 11:00:35,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 11:00:35,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:35,469 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 11:00:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:35,710 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 11:00:35,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 11:00:35,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 11:00:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:35,711 INFO L225 Difference]: With dead ends: 35 [2018-09-30 11:00:35,711 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 11:00:35,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 11:00:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 11:00:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:00:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 11:00:35,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 11:00:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:35,716 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 11:00:35,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 11:00:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 11:00:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 11:00:35,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:35,717 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 11:00:35,717 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:35,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 11:00:35,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:35,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:35,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:35,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:35,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:35,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:35,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:36,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 11:00:36,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:36,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:36,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 11:00:36,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 11:00:36,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 11:00:36,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:36,869 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 11:00:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:37,405 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 11:00:37,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 11:00:37,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 11:00:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:37,406 INFO L225 Difference]: With dead ends: 37 [2018-09-30 11:00:37,407 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 11:00:37,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 11:00:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 11:00:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 11:00:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 11:00:37,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 11:00:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:37,411 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 11:00:37,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 11:00:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 11:00:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 11:00:37,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:37,412 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 11:00:37,412 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:37,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 11:00:37,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:37,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:37,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:37,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:37,681 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 [2018-09-30 11:00:37,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:37,701 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:37,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:37,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:37,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 11:00:37,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 11:00:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 11:00:37,922 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:37,922 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 11:00:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:38,270 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 11:00:38,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 11:00:38,270 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 11:00:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:38,271 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:00:38,271 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 11:00:38,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 11:00:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 11:00:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 11:00:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 11:00:38,276 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 11:00:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:38,276 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 11:00:38,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 11:00:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 11:00:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 11:00:38,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:38,278 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 11:00:38,278 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:38,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 11:00:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:38,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:38,793 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 [2018-09-30 11:00:38,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:38,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 11:00:38,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:38,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:39,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 11:00:39,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 11:00:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 11:00:39,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:39,315 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 11:00:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:39,627 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 11:00:39,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 11:00:39,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 11:00:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:39,628 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:00:39,629 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 11:00:39,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 11:00:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 11:00:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 11:00:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 11:00:39,633 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 11:00:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:39,634 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 11:00:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 11:00:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 11:00:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 11:00:39,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:39,635 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 11:00:39,635 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:39,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 11:00:39,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:39,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:39,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:39,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:39,796 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 [2018-09-30 11:00:39,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:39,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 11:00:39,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:39,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:40,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 11:00:40,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 11:00:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 11:00:40,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:40,253 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 11:00:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:40,790 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 11:00:40,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 11:00:40,790 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 11:00:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:40,791 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:40,791 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 11:00:40,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 11:00:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 11:00:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 11:00:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 11:00:40,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 11:00:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:40,795 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 11:00:40,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 11:00:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 11:00:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 11:00:40,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:40,796 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 11:00:40,796 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:40,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 11:00:40,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:40,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:40,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:40,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:40,925 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 [2018-09-30 11:00:40,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:40,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:41,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:41,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 11:00:41,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 11:00:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 11:00:41,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:41,230 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 11:00:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:41,565 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 11:00:41,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 11:00:41,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 11:00:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:41,566 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:00:41,566 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 11:00:41,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 11:00:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 11:00:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 11:00:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 11:00:41,571 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 11:00:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:41,572 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 11:00:41,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 11:00:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 11:00:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 11:00:41,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:41,573 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 11:00:41,573 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:41,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 11:00:41,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:41,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:41,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:41,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:41,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:41,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:41,805 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 [2018-09-30 11:00:41,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:41,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:41,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:41,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:42,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:42,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 11:00:42,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 11:00:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 11:00:42,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:42,133 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 11:00:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:42,647 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 11:00:42,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 11:00:42,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 11:00:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:42,648 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:42,648 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 11:00:42,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 11:00:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 11:00:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 11:00:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 11:00:42,653 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 11:00:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:42,653 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 11:00:42,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 11:00:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 11:00:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 11:00:42,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:42,654 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 11:00:42,655 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:42,655 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 11:00:42,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:42,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:42,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:42,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:42,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:43,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:00:43,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:43,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 11:00:43,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:43,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:43,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 11:00:43,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 11:00:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 11:00:43,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:43,708 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 11:00:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:44,012 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 11:00:44,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 11:00:44,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 11:00:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:44,013 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:44,013 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 11:00:44,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 11:00:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 11:00:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 11:00:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 11:00:44,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 11:00:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,018 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 11:00:44,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 11:00:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 11:00:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 11:00:44,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,019 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 11:00:44,019 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 11:00:44,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:44,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:44,192 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 [2018-09-30 11:00:44,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:44,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:44,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:44,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:44,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 11:00:44,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 11:00:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 11:00:44,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:44,542 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 11:00:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:44,914 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 11:00:44,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 11:00:44,923 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 11:00:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:44,923 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:44,923 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 11:00:44,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 11:00:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 11:00:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 11:00:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 11:00:44,927 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 11:00:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,928 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 11:00:44,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 11:00:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 11:00:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 11:00:44,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,929 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 11:00:44,929 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,929 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 11:00:44,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:44,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:45,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:45,162 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 [2018-09-30 11:00:45,170 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:45,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 11:00:45,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:45,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:45,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:45,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 11:00:45,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 11:00:45,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 11:00:45,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:45,515 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 11:00:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:45,899 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 11:00:45,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 11:00:45,899 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 11:00:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:45,900 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:45,900 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 11:00:45,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 11:00:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 11:00:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 11:00:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 11:00:45,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 11:00:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:45,904 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 11:00:45,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 11:00:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 11:00:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 11:00:45,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:45,906 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 11:00:45,906 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:45,907 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 11:00:45,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:45,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:45,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:46,565 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 [2018-09-30 11:00:46,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:46,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 11:00:46,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:46,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:47,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:47,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 11:00:47,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 11:00:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 11:00:47,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:47,079 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 11:00:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:47,419 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 11:00:47,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 11:00:47,420 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 11:00:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:47,420 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:47,420 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 11:00:47,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 11:00:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 11:00:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 11:00:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 11:00:47,424 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 11:00:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:47,424 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 11:00:47,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 11:00:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 11:00:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 11:00:47,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:47,426 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 11:00:47,426 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:47,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 11:00:47,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:47,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:47,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:47,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:47,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:47,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:00:47,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:47,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:48,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 11:00:48,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 11:00:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 11:00:48,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:48,606 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 11:00:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:48,978 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 11:00:48,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 11:00:48,979 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 11:00:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:48,979 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:00:48,979 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 11:00:48,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 11:00:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 11:00:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 11:00:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 11:00:48,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 11:00:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:48,984 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 11:00:48,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 11:00:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 11:00:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 11:00:48,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:48,985 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 11:00:48,985 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:48,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 11:00:48,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:48,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:48,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:48,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:49,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:49,240 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 [2018-09-30 11:00:49,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:49,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:49,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:49,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:49,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:49,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 11:00:49,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 11:00:49,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 11:00:49,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:49,606 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 11:00:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:50,153 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 11:00:50,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:00:50,153 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 11:00:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:50,154 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:50,154 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 11:00:50,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 11:00:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 11:00:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 11:00:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 11:00:50,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 11:00:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:50,158 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 11:00:50,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 11:00:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 11:00:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 11:00:50,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:50,159 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 11:00:50,160 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:50,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 11:00:50,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:50,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:50,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:51,120 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 [2018-09-30 11:00:51,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:51,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 11:00:51,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:51,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:51,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 11:00:51,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 11:00:51,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 11:00:51,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:51,751 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 11:00:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:52,108 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 11:00:52,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 11:00:52,109 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 11:00:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:52,109 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:00:52,109 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 11:00:52,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 11:00:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 11:00:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 11:00:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 11:00:52,112 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 11:00:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:52,113 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 11:00:52,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 11:00:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 11:00:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 11:00:52,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:52,114 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 11:00:52,114 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:52,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 11:00:52,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:52,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:52,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:52,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:52,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:52,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:52,346 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 [2018-09-30 11:00:52,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:52,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:52,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:52,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:53,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:53,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 11:00:53,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 11:00:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 11:00:53,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:53,272 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 11:00:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:53,929 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 11:00:53,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 11:00:53,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 11:00:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:53,930 INFO L225 Difference]: With dead ends: 63 [2018-09-30 11:00:53,930 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 11:00:53,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 11:00:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 11:00:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 11:00:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 11:00:53,934 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 11:00:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:53,934 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 11:00:53,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 11:00:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 11:00:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 11:00:53,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:53,935 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 11:00:53,935 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:53,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 11:00:53,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:53,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:53,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:53,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:53,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:54,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:54,152 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 [2018-09-30 11:00:54,160 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:54,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 11:00:54,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:54,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:54,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:54,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 11:00:54,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 11:00:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 11:00:54,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:54,880 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 11:00:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:55,406 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 11:00:55,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 11:00:55,406 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 11:00:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:55,407 INFO L225 Difference]: With dead ends: 65 [2018-09-30 11:00:55,407 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 11:00:55,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 11:00:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 11:00:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 11:00:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 11:00:55,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 11:00:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:55,410 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 11:00:55,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 11:00:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 11:00:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 11:00:55,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:55,411 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 11:00:55,411 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:55,411 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 11:00:55,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:55,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:55,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:55,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:55,672 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 [2018-09-30 11:00:55,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:55,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 11:00:55,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:55,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:56,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:56,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 11:00:56,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 11:00:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 11:00:56,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:56,189 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 11:00:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:56,724 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 11:00:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 11:00:56,725 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 11:00:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:56,725 INFO L225 Difference]: With dead ends: 67 [2018-09-30 11:00:56,725 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 11:00:56,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 11:00:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 11:00:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 11:00:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 11:00:56,729 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 11:00:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:56,729 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 11:00:56,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 11:00:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 11:00:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 11:00:56,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:56,730 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 11:00:56,730 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:56,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 11:00:56,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:56,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:56,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:57,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:57,136 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 [2018-09-30 11:00:57,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:57,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:57,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:57,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 11:00:57,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 11:00:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 11:00:57,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:57,589 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 11:00:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:58,278 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 11:00:58,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 11:00:58,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 11:00:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:58,279 INFO L225 Difference]: With dead ends: 69 [2018-09-30 11:00:58,279 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 11:00:58,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 11:00:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 11:00:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 11:00:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 11:00:58,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 11:00:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:58,282 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 11:00:58,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 11:00:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 11:00:58,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 11:00:58,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:58,283 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 11:00:58,283 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:58,283 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:58,283 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 11:00:58,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:58,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:58,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:58,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:58,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:58,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:58,779 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 [2018-09-30 11:00:58,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:58,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:58,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:58,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:59,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:59,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 11:00:59,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 11:00:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 11:00:59,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:59,656 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 11:01:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:00,238 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 11:01:00,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 11:01:00,239 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 11:01:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:00,239 INFO L225 Difference]: With dead ends: 71 [2018-09-30 11:01:00,239 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 11:01:00,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 11:01:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 11:01:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 11:01:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 11:01:00,243 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 11:01:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:00,243 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 11:01:00,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 11:01:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 11:01:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 11:01:00,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:00,244 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 11:01:00,244 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:00,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 11:01:00,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:00,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:00,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:00,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:00,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:00,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:00,586 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 [2018-09-30 11:01:00,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:00,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 11:01:00,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:00,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:01,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:01,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 11:01:01,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 11:01:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 11:01:01,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:01,100 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 11:01:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:01,897 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 11:01:01,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 11:01:01,897 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 11:01:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:01,898 INFO L225 Difference]: With dead ends: 73 [2018-09-30 11:01:01,898 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 11:01:01,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 11:01:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 11:01:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 11:01:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 11:01:01,901 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 11:01:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:01,901 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 11:01:01,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 11:01:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 11:01:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 11:01:01,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:01,902 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 11:01:01,902 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:01,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 11:01:01,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:01,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:01,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:01,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:01,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:02,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:02,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:01:02,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:02,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:02,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:02,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:03,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:03,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 11:01:03,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 11:01:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 11:01:03,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:03,015 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 11:01:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:03,667 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 11:01:03,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 11:01:03,667 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 11:01:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:03,668 INFO L225 Difference]: With dead ends: 75 [2018-09-30 11:01:03,668 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 11:01:03,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 11:01:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 11:01:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 11:01:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 11:01:03,671 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 11:01:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:03,672 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 11:01:03,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 11:01:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 11:01:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 11:01:03,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:03,673 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 11:01:03,673 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:03,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 11:01:03,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:03,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:03,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:03,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:03,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:03,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:03,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:01:03,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:04,002 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 11:01:04,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:04,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:04,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:04,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 11:01:04,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 11:01:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 11:01:04,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:04,566 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 11:01:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:05,872 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 11:01:05,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 11:01:05,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 11:01:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:05,873 INFO L225 Difference]: With dead ends: 77 [2018-09-30 11:01:05,873 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 11:01:05,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 11:01:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 11:01:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 11:01:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 11:01:05,876 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 11:01:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:05,876 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 11:01:05,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 11:01:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 11:01:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 11:01:05,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:05,877 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 11:01:05,877 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:05,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 11:01:05,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:05,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:05,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:05,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:05,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:06,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:06,208 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 [2018-09-30 11:01:06,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:06,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 11:01:06,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:06,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:06,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:06,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 11:01:06,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 11:01:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 11:01:06,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:06,821 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 11:01:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:07,446 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 11:01:07,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 11:01:07,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 11:01:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:07,447 INFO L225 Difference]: With dead ends: 79 [2018-09-30 11:01:07,447 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 11:01:07,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 11:01:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 11:01:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 11:01:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 11:01:07,450 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 11:01:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:07,451 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 11:01:07,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 11:01:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 11:01:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 11:01:07,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:07,451 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 11:01:07,452 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:07,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 11:01:07,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:07,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:07,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:07,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:07,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:07,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:07,874 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 [2018-09-30 11:01:07,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:07,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:08,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:08,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 11:01:08,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 11:01:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 11:01:08,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:08,627 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 11:01:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:09,443 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 11:01:09,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 11:01:09,443 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 11:01:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:09,444 INFO L225 Difference]: With dead ends: 81 [2018-09-30 11:01:09,444 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 11:01:09,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 11:01:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 11:01:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 11:01:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 11:01:09,447 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 11:01:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:09,447 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 11:01:09,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 11:01:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 11:01:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 11:01:09,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:09,448 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 11:01:09,448 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:09,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 11:01:09,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:09,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:09,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:09,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:09,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:09,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:09,748 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 [2018-09-30 11:01:09,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:09,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:09,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:09,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:10,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:10,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 11:01:10,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 11:01:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 11:01:10,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:10,407 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 11:01:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:11,270 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 11:01:11,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 11:01:11,270 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 11:01:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:11,271 INFO L225 Difference]: With dead ends: 83 [2018-09-30 11:01:11,271 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 11:01:11,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 11:01:11,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 11:01:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 11:01:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 11:01:11,275 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 11:01:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:11,275 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 11:01:11,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 11:01:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 11:01:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 11:01:11,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:11,276 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 11:01:11,276 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:11,276 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 11:01:11,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:11,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:11,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:11,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:11,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:01:11,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:11,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 11:01:11,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:11,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:12,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:12,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 11:01:12,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 11:01:12,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 11:01:12,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:12,268 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 11:01:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:13,114 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 11:01:13,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 11:01:13,115 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 11:01:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:13,115 INFO L225 Difference]: With dead ends: 85 [2018-09-30 11:01:13,115 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 11:01:13,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 11:01:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 11:01:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 11:01:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 11:01:13,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 11:01:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:13,119 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 11:01:13,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 11:01:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 11:01:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 11:01:13,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:13,120 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 11:01:13,120 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:13,121 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 11:01:13,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:13,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:13,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:13,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:13,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:13,607 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 [2018-09-30 11:01:13,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:13,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:13,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:13,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:14,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:14,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 11:01:14,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 11:01:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 11:01:14,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:14,308 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 11:01:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:15,213 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 11:01:15,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 11:01:15,214 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 11:01:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:15,214 INFO L225 Difference]: With dead ends: 87 [2018-09-30 11:01:15,214 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 11:01:15,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 11:01:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 11:01:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 11:01:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 11:01:15,218 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 11:01:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:15,219 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 11:01:15,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 11:01:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 11:01:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 11:01:15,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:15,220 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 11:01:15,220 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:15,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 11:01:15,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:15,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:15,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:15,695 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 [2018-09-30 11:01:15,715 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:15,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 11:01:15,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:15,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:16,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:16,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 11:01:16,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 11:01:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 11:01:16,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:16,518 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 11:01:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:17,325 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 11:01:17,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 11:01:17,325 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 11:01:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:17,326 INFO L225 Difference]: With dead ends: 89 [2018-09-30 11:01:17,326 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 11:01:17,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 11:01:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 11:01:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 11:01:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 11:01:17,330 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 11:01:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:17,330 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 11:01:17,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 11:01:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 11:01:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 11:01:17,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:17,331 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 11:01:17,332 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:17,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 11:01:17,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:17,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:17,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:17,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:17,659 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 [2018-09-30 11:01:17,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:17,708 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 11:01:17,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:17,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:18,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:18,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 11:01:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 11:01:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 11:01:18,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:18,685 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 11:01:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:19,552 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 11:01:19,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 11:01:19,553 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 11:01:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:19,553 INFO L225 Difference]: With dead ends: 91 [2018-09-30 11:01:19,553 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 11:01:19,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 11:01:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 11:01:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 11:01:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 11:01:19,557 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 11:01:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:19,557 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 11:01:19,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 11:01:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 11:01:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 11:01:19,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:19,558 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 11:01:19,558 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:19,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 11:01:19,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:19,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:19,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:20,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:20,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:01:20,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:20,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:21,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 11:01:21,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 11:01:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 11:01:21,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:21,235 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 11:01:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:22,130 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 11:01:22,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 11:01:22,131 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 11:01:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:22,131 INFO L225 Difference]: With dead ends: 93 [2018-09-30 11:01:22,131 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 11:01:22,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 11:01:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 11:01:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 11:01:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 11:01:22,134 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 11:01:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:22,135 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 11:01:22,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 11:01:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 11:01:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 11:01:22,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:22,135 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 11:01:22,136 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:22,136 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 11:01:22,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:22,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:22,605 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 [2018-09-30 11:01:22,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:22,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:22,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:22,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:23,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 11:01:23,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 11:01:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 11:01:23,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:23,474 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 11:01:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:24,576 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 11:01:24,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 11:01:24,576 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 11:01:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:24,577 INFO L225 Difference]: With dead ends: 95 [2018-09-30 11:01:24,577 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 11:01:24,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 11:01:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 11:01:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 11:01:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 11:01:24,581 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 11:01:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:24,582 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 11:01:24,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 11:01:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 11:01:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 11:01:24,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:24,583 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 11:01:24,583 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:24,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 11:01:24,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:24,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:24,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:24,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:25,049 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 [2018-09-30 11:01:25,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:25,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 11:01:25,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:25,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:26,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 11:01:26,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 11:01:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 11:01:26,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:26,010 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 11:01:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:27,020 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 11:01:27,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 11:01:27,020 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 11:01:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:27,021 INFO L225 Difference]: With dead ends: 97 [2018-09-30 11:01:27,021 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 11:01:27,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 11:01:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 11:01:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 11:01:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 11:01:27,025 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 11:01:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:27,025 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 11:01:27,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 11:01:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 11:01:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 11:01:27,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:27,026 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 11:01:27,026 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:27,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 11:01:27,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:27,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:27,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:27,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:27,333 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 [2018-09-30 11:01:27,342 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:27,369 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:27,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:27,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:28,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 11:01:28,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 11:01:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 11:01:28,273 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:28,274 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 11:01:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:29,435 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 11:01:29,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 11:01:29,436 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 11:01:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:29,436 INFO L225 Difference]: With dead ends: 99 [2018-09-30 11:01:29,437 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 11:01:29,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 11:01:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 11:01:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 11:01:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 11:01:29,439 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 11:01:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:29,440 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 11:01:29,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 11:01:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 11:01:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 11:01:29,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:29,440 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 11:01:29,441 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:29,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 11:01:29,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:29,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:29,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:30,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:30,242 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 [2018-09-30 11:01:30,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:30,295 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 11:01:30,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:30,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:31,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 11:01:31,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 11:01:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 11:01:31,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:31,319 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 11:01:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:32,376 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 11:01:32,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 11:01:32,376 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 11:01:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:32,377 INFO L225 Difference]: With dead ends: 101 [2018-09-30 11:01:32,377 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 11:01:32,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 11:01:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 11:01:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 11:01:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 11:01:32,381 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 11:01:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:32,381 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 11:01:32,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 11:01:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 11:01:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 11:01:32,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:32,382 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 11:01:32,383 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:32,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 11:01:32,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:32,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:32,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:32,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:32,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:32,942 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 [2018-09-30 11:01:32,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:32,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 11:01:32,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:32,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:34,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 11:01:34,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 11:01:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 11:01:34,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:34,047 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 11:01:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:35,114 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 11:01:35,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 11:01:35,114 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 11:01:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:35,115 INFO L225 Difference]: With dead ends: 103 [2018-09-30 11:01:35,115 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 11:01:35,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 11:01:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 11:01:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 11:01:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 11:01:35,119 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 11:01:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:35,119 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 11:01:35,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 11:01:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 11:01:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 11:01:35,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:35,120 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 11:01:35,120 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:35,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 11:01:35,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:35,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:35,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:35,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:35,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:35,483 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 [2018-09-30 11:01:35,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:35,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:37,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 11:01:37,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 11:01:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 11:01:37,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:37,248 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 11:01:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:38,369 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 11:01:38,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 11:01:38,369 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 11:01:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:38,370 INFO L225 Difference]: With dead ends: 105 [2018-09-30 11:01:38,370 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 11:01:38,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 11:01:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 11:01:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 11:01:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 11:01:38,374 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 11:01:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:38,375 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 11:01:38,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 11:01:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 11:01:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 11:01:38,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:38,376 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 11:01:38,376 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:38,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 11:01:38,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:38,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:38,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:38,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:38,683 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 [2018-09-30 11:01:38,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:38,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:38,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:38,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:40,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 11:01:40,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 11:01:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 11:01:40,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:40,577 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 11:01:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:43,104 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 11:01:43,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 11:01:43,104 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 11:01:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:43,105 INFO L225 Difference]: With dead ends: 107 [2018-09-30 11:01:43,105 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 11:01:43,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 11:01:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 11:01:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 11:01:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 11:01:43,110 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 11:01:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:43,111 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 11:01:43,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 11:01:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 11:01:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 11:01:43,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:43,112 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 11:01:43,112 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:43,112 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 11:01:43,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:43,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:43,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:43,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:43,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:43,805 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 [2018-09-30 11:01:43,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:43,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 11:01:43,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:43,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:45,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:45,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 11:01:45,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 11:01:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 11:01:45,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:45,113 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 11:01:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:46,497 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 11:01:46,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 11:01:46,498 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 11:01:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:46,498 INFO L225 Difference]: With dead ends: 109 [2018-09-30 11:01:46,498 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 11:01:46,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 11:01:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 11:01:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 11:01:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 11:01:46,503 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 11:01:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:46,503 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 11:01:46,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 11:01:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 11:01:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 11:01:46,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:46,504 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 11:01:46,504 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:46,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 11:01:46,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:46,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:46,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:46,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:46,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:46,821 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 [2018-09-30 11:01:46,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:46,885 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:46,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:46,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:48,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:48,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 11:01:48,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 11:01:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 11:01:48,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:48,077 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 11:01:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:49,723 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 11:01:49,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 11:01:49,723 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 11:01:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:49,724 INFO L225 Difference]: With dead ends: 111 [2018-09-30 11:01:49,724 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 11:01:49,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 11:01:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 11:01:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 11:01:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 11:01:49,728 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 11:01:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:49,728 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 11:01:49,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 11:01:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 11:01:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 11:01:49,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:49,729 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 11:01:49,729 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:49,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 11:01:49,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:49,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:49,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:49,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:50,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:50,078 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 [2018-09-30 11:01:50,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:50,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 11:01:50,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:50,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:51,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:51,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 11:01:51,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 11:01:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 11:01:51,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:51,504 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 11:01:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:52,870 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 11:01:52,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 11:01:52,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 11:01:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:52,871 INFO L225 Difference]: With dead ends: 113 [2018-09-30 11:01:52,871 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 11:01:52,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 11:01:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 11:01:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 11:01:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 11:01:52,874 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 11:01:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:52,874 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 11:01:52,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 11:01:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 11:01:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 11:01:52,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:52,875 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 11:01:52,875 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:52,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:52,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 11:01:52,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:52,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:52,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:52,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:53,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:53,718 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 [2018-09-30 11:01:53,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:53,776 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 11:01:53,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:53,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:55,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:55,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 11:01:55,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 11:01:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 11:01:55,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:55,184 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 11:01:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:56,847 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 11:01:56,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 11:01:56,847 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 11:01:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:56,848 INFO L225 Difference]: With dead ends: 115 [2018-09-30 11:01:56,848 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 11:01:56,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 11:01:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 11:01:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 11:01:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 11:01:56,852 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 11:01:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 11:01:56,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 11:01:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 11:01:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 11:01:56,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:56,854 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 11:01:56,854 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:56,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 11:01:56,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:56,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:57,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:57,204 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 [2018-09-30 11:01:57,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:57,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:58,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:58,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 11:01:58,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 11:01:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 11:01:58,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:58,564 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 11:01:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:59,997 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 11:01:59,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 11:01:59,997 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 11:01:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:59,998 INFO L225 Difference]: With dead ends: 117 [2018-09-30 11:01:59,998 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 11:01:59,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 11:02:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 11:02:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 11:02:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 11:02:00,002 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 11:02:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:00,003 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 11:02:00,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 11:02:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 11:02:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 11:02:00,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:00,004 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 11:02:00,004 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:00,004 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 11:02:00,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:00,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:00,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:00,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:00,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:00,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:00,342 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 [2018-09-30 11:02:00,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:00,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:00,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:00,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:01,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:01,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 11:02:01,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 11:02:01,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 11:02:01,670 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:01,670 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 11:02:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:03,417 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 11:02:03,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 11:02:03,417 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 11:02:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:03,418 INFO L225 Difference]: With dead ends: 119 [2018-09-30 11:02:03,418 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 11:02:03,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 11:02:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 11:02:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 11:02:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 11:02:03,421 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 11:02:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:03,422 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 11:02:03,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 11:02:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 11:02:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 11:02:03,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:03,422 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 11:02:03,423 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:03,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 11:02:03,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:03,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:03,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:03,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:03,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:03,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:03,862 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 [2018-09-30 11:02:03,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:03,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 11:02:03,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:03,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:05,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:05,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 11:02:05,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 11:02:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 11:02:05,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:05,448 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 11:02:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:07,089 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 11:02:07,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 11:02:07,089 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 11:02:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:07,090 INFO L225 Difference]: With dead ends: 121 [2018-09-30 11:02:07,090 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 11:02:07,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 11:02:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 11:02:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 11:02:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 11:02:07,093 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 11:02:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:07,093 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 11:02:07,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 11:02:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 11:02:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 11:02:07,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:07,094 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 11:02:07,094 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:07,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 11:02:07,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:07,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:07,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:07,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:07,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:07,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:07,445 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 [2018-09-30 11:02:07,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:07,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:07,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:07,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:09,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:09,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 11:02:09,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 11:02:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 11:02:09,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:09,101 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 11:02:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:10,800 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 11:02:10,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 11:02:10,801 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 11:02:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:10,804 INFO L225 Difference]: With dead ends: 123 [2018-09-30 11:02:10,804 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 11:02:10,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 11:02:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 11:02:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 11:02:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 11:02:10,809 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 11:02:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:10,809 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 11:02:10,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 11:02:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 11:02:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 11:02:10,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:10,810 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 11:02:10,810 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:10,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 11:02:10,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:10,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:11,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:11,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:02:11,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:11,268 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 11:02:11,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:11,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:12,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:12,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 11:02:12,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 11:02:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 11:02:12,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:12,854 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 11:02:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:14,976 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 11:02:14,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 11:02:14,977 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 11:02:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:14,977 INFO L225 Difference]: With dead ends: 125 [2018-09-30 11:02:14,977 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 11:02:14,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 11:02:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 11:02:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 11:02:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 11:02:14,982 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 11:02:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:14,982 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 11:02:14,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 11:02:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 11:02:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 11:02:14,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:14,983 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 11:02:14,984 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:14,984 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 11:02:14,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:14,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:14,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:14,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:14,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:15,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:15,529 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 [2018-09-30 11:02:15,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:15,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 11:02:15,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:15,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:17,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:17,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 11:02:17,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 11:02:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 11:02:17,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:17,172 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 11:02:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:19,164 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 11:02:19,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 11:02:19,164 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 11:02:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:19,165 INFO L225 Difference]: With dead ends: 127 [2018-09-30 11:02:19,165 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 11:02:19,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 11:02:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 11:02:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 11:02:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 11:02:19,168 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 11:02:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:19,168 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 11:02:19,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 11:02:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 11:02:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 11:02:19,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:19,169 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 11:02:19,169 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:19,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 11:02:19,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:19,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:19,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:19,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:19,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:19,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:19,550 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 [2018-09-30 11:02:19,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:19,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:21,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:21,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 11:02:21,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 11:02:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 11:02:21,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:21,303 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 11:02:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:23,328 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 11:02:23,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 11:02:23,328 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 11:02:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:23,329 INFO L225 Difference]: With dead ends: 129 [2018-09-30 11:02:23,329 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 11:02:23,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 11:02:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 11:02:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 11:02:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 11:02:23,332 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 11:02:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:23,332 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 11:02:23,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 11:02:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 11:02:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 11:02:23,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:23,333 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 11:02:23,333 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:23,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 11:02:23,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:23,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:23,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:23,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:23,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:24,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:24,745 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 [2018-09-30 11:02:24,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:24,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:24,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:24,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:26,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:26,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 11:02:26,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 11:02:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 11:02:26,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:26,552 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 11:02:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:28,628 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 11:02:28,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 11:02:28,628 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 11:02:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:28,629 INFO L225 Difference]: With dead ends: 131 [2018-09-30 11:02:28,629 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 11:02:28,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 11:02:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 11:02:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 11:02:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 11:02:28,633 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 11:02:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:28,633 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 11:02:28,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 11:02:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 11:02:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 11:02:28,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:28,634 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 11:02:28,634 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:28,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 11:02:28,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:28,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:28,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:28,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:29,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:29,783 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 [2018-09-30 11:02:29,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:29,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 11:02:29,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:29,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:31,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:31,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 11:02:31,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 11:02:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 11:02:31,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:31,716 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 11:02:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:33,845 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 11:02:33,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 11:02:33,845 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 11:02:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:33,846 INFO L225 Difference]: With dead ends: 133 [2018-09-30 11:02:33,846 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 11:02:33,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 11:02:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 11:02:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 11:02:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 11:02:33,850 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 11:02:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:33,850 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 11:02:33,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 11:02:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 11:02:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 11:02:33,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:33,851 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 11:02:33,851 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:33,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 11:02:33,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:33,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:33,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:34,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:34,246 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) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:34,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:34,291 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:34,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:34,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:36,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:36,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 11:02:36,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 11:02:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 11:02:36,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:36,166 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 11:02:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:38,430 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 11:02:38,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 11:02:38,430 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 11:02:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:38,431 INFO L225 Difference]: With dead ends: 135 [2018-09-30 11:02:38,432 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 11:02:38,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 11:02:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 11:02:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 11:02:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 11:02:38,436 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 11:02:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:38,437 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 11:02:38,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 11:02:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 11:02:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 11:02:38,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:38,438 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 11:02:38,438 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:38,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 11:02:38,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:38,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:38,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:38,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:38,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:39,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:39,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:02:39,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:39,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 11:02:39,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:39,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:42,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:42,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 11:02:42,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 11:02:42,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 11:02:42,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:42,256 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 11:02:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:44,623 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 11:02:44,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 11:02:44,623 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 11:02:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:44,624 INFO L225 Difference]: With dead ends: 137 [2018-09-30 11:02:44,624 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 11:02:44,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 11:02:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 11:02:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 11:02:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 11:02:44,629 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 11:02:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:44,629 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 11:02:44,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 11:02:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 11:02:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 11:02:44,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:44,630 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 11:02:44,630 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:44,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 11:02:44,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:44,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:44,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:45,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:45,024 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 [2018-09-30 11:02:45,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:45,101 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 11:02:45,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:45,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:47,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:47,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 11:02:47,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 11:02:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 11:02:47,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:47,406 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 11:02:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:49,945 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 11:02:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 11:02:49,945 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 11:02:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:49,946 INFO L225 Difference]: With dead ends: 139 [2018-09-30 11:02:49,946 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 11:02:49,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 11:02:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 11:02:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 11:02:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 11:02:49,951 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 11:02:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:49,951 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 11:02:49,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 11:02:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 11:02:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 11:02:49,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:49,952 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 11:02:49,952 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:49,953 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 11:02:49,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:49,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:49,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:49,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:49,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:50,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:50,375 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 [2018-09-30 11:02:50,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:50,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:52,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:52,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 11:02:52,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 11:02:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 11:02:52,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:52,500 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 11:02:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:54,904 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 11:02:54,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 11:02:54,905 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 11:02:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:54,905 INFO L225 Difference]: With dead ends: 141 [2018-09-30 11:02:54,905 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 11:02:54,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 11:02:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 11:02:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 11:02:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 11:02:54,908 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 11:02:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:54,909 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 11:02:54,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 11:02:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 11:02:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 11:02:54,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:54,909 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 11:02:54,909 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:54,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 11:02:54,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:54,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:54,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:54,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:54,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:55,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:55,337 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 [2018-09-30 11:02:55,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:55,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:55,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:55,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:57,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:57,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 11:02:57,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 11:02:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 11:02:57,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:57,571 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 11:03:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:00,032 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 11:03:00,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 11:03:00,033 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 11:03:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:00,033 INFO L225 Difference]: With dead ends: 143 [2018-09-30 11:03:00,033 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 11:03:00,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 11:03:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 11:03:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 11:03:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 11:03:00,036 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 11:03:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:00,037 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 11:03:00,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 11:03:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 11:03:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 11:03:00,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:00,037 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 11:03:00,038 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:00,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:00,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 11:03:00,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:00,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:00,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:00,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:00,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:00,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:00,478 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 [2018-09-30 11:03:00,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:03:00,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 11:03:00,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:00,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:02,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:02,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 11:03:02,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 11:03:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 11:03:02,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:02,833 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 11:03:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:05,567 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 11:03:05,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 11:03:05,567 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 11:03:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:05,568 INFO L225 Difference]: With dead ends: 145 [2018-09-30 11:03:05,568 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 11:03:05,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 11:03:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 11:03:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 11:03:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 11:03:05,573 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 11:03:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:05,573 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 11:03:05,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 11:03:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 11:03:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 11:03:05,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:05,574 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 11:03:05,574 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:05,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 11:03:05,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:05,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:05,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:05,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:05,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:06,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:06,101 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 [2018-09-30 11:03:06,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:03:06,147 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:03:06,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:06,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:08,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:08,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 11:03:08,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 11:03:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 11:03:08,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:08,661 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 11:03:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:11,256 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 11:03:11,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 11:03:11,256 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 11:03:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:11,257 INFO L225 Difference]: With dead ends: 147 [2018-09-30 11:03:11,257 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 11:03:11,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 11:03:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 11:03:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 11:03:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 11:03:11,261 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 11:03:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:11,261 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 11:03:11,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 11:03:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 11:03:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 11:03:11,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:11,262 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 11:03:11,263 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:11,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:11,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 11:03:11,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:11,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:11,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:11,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:11,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:11,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:11,727 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 [2018-09-30 11:03:11,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:11,937 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 11:03:11,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:11,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:14,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:14,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 11:03:14,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 11:03:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 11:03:14,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:14,572 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 11:03:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:17,436 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 11:03:17,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 11:03:17,437 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 11:03:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:17,437 INFO L225 Difference]: With dead ends: 149 [2018-09-30 11:03:17,438 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 11:03:17,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 11:03:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 11:03:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 11:03:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 11:03:17,442 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 11:03:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:17,443 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 11:03:17,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 11:03:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 11:03:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 11:03:17,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:17,444 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 11:03:17,444 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:17,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 11:03:17,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:17,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:17,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:17,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:17,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:17,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:17,949 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 [2018-09-30 11:03:17,958 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:18,044 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 11:03:18,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:18,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:20,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:20,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 11:03:20,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 11:03:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 11:03:20,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:20,500 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 11:03:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:23,232 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 11:03:23,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 11:03:23,232 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 11:03:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:23,233 INFO L225 Difference]: With dead ends: 151 [2018-09-30 11:03:23,234 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 11:03:23,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 11:03:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 11:03:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 11:03:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 11:03:23,239 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 11:03:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:23,239 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 11:03:23,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 11:03:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 11:03:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 11:03:23,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:23,240 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 11:03:23,240 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:23,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 11:03:23,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:23,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:23,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:23,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:23,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:23,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:23,738 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 [2018-09-30 11:03:23,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:23,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:26,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:26,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 11:03:26,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 11:03:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 11:03:26,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:26,406 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 11:03:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:29,534 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 11:03:29,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 11:03:29,534 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 11:03:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:29,535 INFO L225 Difference]: With dead ends: 153 [2018-09-30 11:03:29,535 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 11:03:29,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 11:03:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 11:03:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 11:03:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 11:03:29,540 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 11:03:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:29,540 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 11:03:29,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 11:03:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 11:03:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 11:03:29,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:29,541 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 11:03:29,541 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:29,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 11:03:29,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:29,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:29,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:29,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:29,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:30,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:30,076 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 [2018-09-30 11:03:30,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:03:30,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:03:30,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:30,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:32,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:32,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 11:03:32,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 11:03:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 11:03:32,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:32,787 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 11:03:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:35,812 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 11:03:35,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 11:03:35,812 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 11:03:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:35,813 INFO L225 Difference]: With dead ends: 155 [2018-09-30 11:03:35,813 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 11:03:35,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 11:03:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 11:03:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 11:03:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 11:03:35,816 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 11:03:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:35,817 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 11:03:35,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 11:03:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 11:03:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 11:03:35,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:35,817 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 11:03:35,818 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:35,818 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 11:03:35,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:35,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:35,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:35,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:35,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:36,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:36,317 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 [2018-09-30 11:03:36,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:03:36,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 11:03:36,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:36,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:39,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:39,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 11:03:39,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 11:03:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 11:03:39,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:39,163 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 11:03:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:42,227 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 11:03:42,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 11:03:42,227 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 11:03:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:42,228 INFO L225 Difference]: With dead ends: 157 [2018-09-30 11:03:42,228 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 11:03:42,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 11:03:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 11:03:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 11:03:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 11:03:42,231 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 11:03:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:42,231 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 11:03:42,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 11:03:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 11:03:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 11:03:42,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:42,232 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 11:03:42,232 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:42,232 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:42,232 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 11:03:42,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:42,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:42,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:42,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:42,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:42,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:42,741 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 [2018-09-30 11:03:42,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:03:42,793 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:03:42,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:42,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:45,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:45,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 11:03:45,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 11:03:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 11:03:45,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:45,625 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 11:03:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:48,848 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 11:03:48,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 11:03:48,849 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 11:03:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:48,849 INFO L225 Difference]: With dead ends: 159 [2018-09-30 11:03:48,850 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 11:03:48,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 11:03:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 11:03:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 11:03:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 11:03:48,853 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 11:03:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:48,853 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 11:03:48,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 11:03:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 11:03:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 11:03:48,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:48,854 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 11:03:48,854 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:48,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 11:03:48,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:48,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:48,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:49,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:49,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:03:49,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:49,471 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 11:03:49,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:49,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:52,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:52,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 11:03:52,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 11:03:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 11:03:52,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:52,383 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 11:03:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:56,032 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 11:03:56,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 11:03:56,032 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 11:03:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:56,033 INFO L225 Difference]: With dead ends: 161 [2018-09-30 11:03:56,033 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 11:03:56,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 11:03:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 11:03:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 11:03:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 11:03:56,038 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 11:03:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:56,039 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 11:03:56,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 11:03:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 11:03:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 11:03:56,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:56,040 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 11:03:56,040 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:56,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 11:03:56,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:56,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:56,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:56,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:56,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:56,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:56,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:03:56,556 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:56,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 11:03:56,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:56,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:59,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:59,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 11:03:59,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 11:03:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 11:03:59,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:59,661 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 11:04:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:03,320 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 11:04:03,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 11:04:03,320 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 11:04:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:03,321 INFO L225 Difference]: With dead ends: 163 [2018-09-30 11:04:03,321 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 11:04:03,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 11:04:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 11:04:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 11:04:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 11:04:03,326 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 11:04:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:03,326 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 11:04:03,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 11:04:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 11:04:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 11:04:03,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:03,327 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 11:04:03,328 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:03,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 11:04:03,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:03,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:03,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:03,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:03,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:04,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:04,000 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 [2018-09-30 11:04:04,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:04,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:07,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:07,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 11:04:07,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 11:04:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 11:04:07,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:07,143 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 11:04:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:10,953 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 11:04:10,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 11:04:10,954 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 11:04:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:10,955 INFO L225 Difference]: With dead ends: 165 [2018-09-30 11:04:10,955 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 11:04:10,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 11:04:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 11:04:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 11:04:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 11:04:10,960 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 11:04:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:10,960 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 11:04:10,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 11:04:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 11:04:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 11:04:10,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:10,962 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 11:04:10,962 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:10,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 11:04:10,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:10,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:10,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:10,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:10,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:11,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:11,522 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 [2018-09-30 11:04:11,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:04:11,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:04:11,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:11,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:14,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:14,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 11:04:14,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 11:04:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 11:04:14,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:14,782 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 11:04:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:18,730 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 11:04:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 11:04:18,730 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 11:04:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:18,731 INFO L225 Difference]: With dead ends: 167 [2018-09-30 11:04:18,731 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 11:04:18,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 11:04:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 11:04:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 11:04:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 11:04:18,734 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 11:04:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:18,735 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 11:04:18,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 11:04:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 11:04:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 11:04:18,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:18,735 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 11:04:18,736 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:18,736 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 11:04:18,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:18,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:18,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:18,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:18,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:19,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:19,306 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 [2018-09-30 11:04:19,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:04:19,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 11:04:19,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:19,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:22,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:22,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-09-30 11:04:22,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 11:04:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 11:04:22,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:22,703 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-09-30 11:04:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:26,488 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 11:04:26,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 11:04:26,488 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-09-30 11:04:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:26,489 INFO L225 Difference]: With dead ends: 169 [2018-09-30 11:04:26,489 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 11:04:26,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 11:04:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 11:04:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 11:04:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 11:04:26,493 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-09-30 11:04:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:26,493 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 11:04:26,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 11:04:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 11:04:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 11:04:26,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:26,494 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-09-30 11:04:26,494 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:26,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-09-30 11:04:26,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:26,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:26,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:26,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:26,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:27,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:27,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 11:04:27,059 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:04:27,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:04:27,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:27,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:30,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:30,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 11:04:30,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 11:04:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 11:04:30,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:30,470 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-09-30 11:04:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:34,157 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 11:04:34,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 11:04:34,158 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-09-30 11:04:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:34,158 INFO L225 Difference]: With dead ends: 171 [2018-09-30 11:04:34,158 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 11:04:34,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 11:04:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 11:04:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 11:04:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 11:04:34,162 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-09-30 11:04:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:34,162 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 11:04:34,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 11:04:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 11:04:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 11:04:34,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:34,163 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-09-30 11:04:34,163 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:34,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-09-30 11:04:34,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:34,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:34,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:34,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:34,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:34,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:34,723 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 [2018-09-30 11:04:34,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:04:34,841 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 11:04:34,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:34,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 11:04:35,815 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 11:04:36,016 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:36,016 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 11:04:36,022 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 11:04:36,022 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:04:36 BoogieIcfgContainer [2018-09-30 11:04:36,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 11:04:36,023 INFO L168 Benchmark]: Toolchain (without parser) took 251080.61 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -83.9 MB). Free memory was 1.5 GB in the beginning and 929.9 MB in the end (delta: 523.2 MB). Peak memory consumption was 439.3 MB. Max. memory is 7.1 GB. [2018-09-30 11:04:36,025 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:04:36,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.67 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:04:36,026 INFO L168 Benchmark]: Boogie Preprocessor took 24.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:04:36,026 INFO L168 Benchmark]: RCFGBuilder took 306.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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. [2018-09-30 11:04:36,027 INFO L168 Benchmark]: TraceAbstraction took 250698.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -83.9 MB). Free memory was 1.4 GB in the beginning and 929.9 MB in the end (delta: 502.0 MB). Peak memory consumption was 418.1 MB. Max. memory is 7.1 GB. [2018-09-30 11:04:36,030 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 0.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.67 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 306.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 250698.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -83.9 MB). Free memory was 1.4 GB in the beginning and 929.9 MB in the end (delta: 502.0 MB). Peak memory consumption was 418.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 170 with TraceHistMax 84, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 250.6s OverallTime, 84 OverallIterations, 84 TraceHistogramMax, 111.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 168 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 14394 SolverSat, 238 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10456 GetRequests, 3485 SyntacticMatches, 0 SemanticMatches, 6971 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 83 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 128.8s InterpolantComputationTime, 14107 NumberOfCodeBlocks, 14107 NumberOfCodeBlocksAsserted, 1860 NumberOfCheckSat, 13942 ConstructedInterpolants, 0 QuantifiedInterpolants, 9314564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 14268 ConjunctsInSsa, 3649 ConjunctsInUnsatCore, 165 InterpolantComputations, 1 PerfectInterpolantSequences, 0/381136 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_11-04-36-048.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_11-04-36-048.csv Completed graceful shutdown