java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:50:25,729 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:50:25,731 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:50:25,747 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-02 11:50:25,780 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:50:25,794 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:50:25,794 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:50:25,795 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:50:25,795 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:50:25,796 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:50:25,796 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:50:25,796 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:50:25,797 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:50:25,797 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:50:25,797 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:50:25,797 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:50:25,797 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:50:25,798 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:50:25,798 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:50:25,798 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:50:25,798 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:50:25,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:50:25,799 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:50:25,799 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:50:25,799 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:50:25,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:50:25,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:50:25,800 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:50:25,800 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:50:25,800 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:50:25,800 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:50:25,800 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:50:25,800 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:50:25,801 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:50:25,801 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:50:25,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:50:25,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:50:25,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:50:25,860 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:50:25,861 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:50:25,861 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-02 11:50:25,862 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-02 11:50:25,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:50:25,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:50:25,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:50:25,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:50:25,917 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:50:25,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:50:25,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:50:25,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:50:25,958 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:50:25,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... [2018-10-02 11:50:25,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:50:25,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:50:25,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:50:25,981 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:50:25,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:50:26,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 11:50:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:50:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:50:26,312 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:50:26,312 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:50:26 BoogieIcfgContainer [2018-10-02 11:50:26,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:50:26,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:50:26,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:50:26,317 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:50:26,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:25" (1/2) ... [2018-10-02 11:50:26,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e1a2ca and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:50:26, skipping insertion in model container [2018-10-02 11:50:26,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:50:26" (2/2) ... [2018-10-02 11:50:26,321 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-02 11:50:26,331 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:50:26,339 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:50:26,386 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:50:26,387 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:50:26,387 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:50:26,387 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:50:26,387 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:50:26,388 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:50:26,388 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:50:26,388 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:50:26,388 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:50:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-02 11:50:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:50:26,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:26,412 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:50:26,413 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:26,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-02 11:50:26,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:26,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:26,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:26,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:26,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:26,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:50:26,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:50:26,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:50:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:50:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:50:26,694 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-02 11:50:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:26,858 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-02 11:50:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:50:26,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:50:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:26,885 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:50:26,886 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:50:26,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:50:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:50:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-02 11:50:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:50:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-02 11:50:26,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-02 11:50:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:26,930 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-02 11:50:26,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:50:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-02 11:50:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:50:26,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:26,931 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:50:26,931 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:26,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-02 11:50:26,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:26,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:26,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:26,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:26,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:27,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:50:27,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-02 11:50:27,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:50:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:50:27,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:50:27,023 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-02 11:50:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:27,101 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-02 11:50:27,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:50:27,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-02 11:50:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:27,103 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:50:27,103 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:50:27,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:50:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:50:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 11:50:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:50:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-02 11:50:27,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-02 11:50:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:27,111 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-02 11:50:27,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:50:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-02 11:50:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:50:27,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:27,112 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:50:27,112 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:27,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-02 11:50:27,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:27,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:27,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:27,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:27,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-02 11:50:27,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:50:27,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:50:27,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:50:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:50:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:50:27,178 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-02 11:50:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:27,292 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-02 11:50:27,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:50:27,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-02 11:50:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:27,294 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:50:27,294 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:50:27,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:50:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:50:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-02 11:50:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:50:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-02 11:50:27,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-02 11:50:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:27,301 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-02 11:50:27,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:50:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-02 11:50:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:50:27,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:27,303 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:50:27,303 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:27,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-02 11:50:27,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:27,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:27,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:27,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:27,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:27,672 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-02 11:50:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:27,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:27,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:27,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:27,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:27,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:27,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-02 11:50:27,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:50:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:50:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:50:27,839 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-02 11:50:27,985 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-02 11:50:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:28,196 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-02 11:50:28,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:50:28,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-02 11:50:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:28,198 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:50:28,198 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:50:28,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:50:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:50:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-02 11:50:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:50:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-02 11:50:28,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-02 11:50:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:28,205 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-02 11:50:28,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:50:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-02 11:50:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:50:28,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:28,206 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:50:28,207 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:28,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:28,207 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-02 11:50:28,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:28,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:28,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:28,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:28,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:28,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:28,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-02 11:50:28,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:50:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:50:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:50:28,496 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-02 11:50:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:28,914 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-02 11:50:28,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:50:28,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:50:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:28,915 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:50:28,915 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:50:28,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:50:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:50:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-02 11:50:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:50:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-02 11:50:28,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-02 11:50:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:28,922 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-02 11:50:28,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:50:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-02 11:50:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:50:28,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:28,923 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:50:28,923 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:28,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-02 11:50:28,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:28,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:29,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:29,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:29,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:29,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:29,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:29,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:29,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:29,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-02 11:50:29,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:50:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:50:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:50:29,594 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-02 11:50:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:30,412 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-02 11:50:30,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:50:30,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-02 11:50:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:30,415 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:50:30,416 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:50:30,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:50:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:50:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-02 11:50:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:50:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-02 11:50:30,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-02 11:50:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:30,423 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-02 11:50:30,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:50:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-02 11:50:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:50:30,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:30,425 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 11:50:30,425 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:30,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-02 11:50:30,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:30,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:30,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:30,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:30,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:30,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:30,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:30,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:30,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:50:30,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:30,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:30,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:30,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-02 11:50:30,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:50:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:50:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:50:30,947 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-02 11:50:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:31,460 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-02 11:50:31,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:50:31,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-02 11:50:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:31,462 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:50:31,462 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:50:31,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:50:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:50:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-02 11:50:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:50:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-02 11:50:31,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-02 11:50:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:31,471 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-02 11:50:31,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:50:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-02 11:50:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:50:31,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:31,472 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-02 11:50:31,472 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:31,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-02 11:50:31,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:31,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:31,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:31,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:31,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:31,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:31,610 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:31,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:31,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:31,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:31,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-02 11:50:31,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:50:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:50:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:50:31,725 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-02 11:50:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:32,187 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-02 11:50:32,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:50:32,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-02 11:50:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:32,189 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:50:32,189 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:50:32,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:50:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:50:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-02 11:50:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:50:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-02 11:50:32,197 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-02 11:50:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:32,197 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-02 11:50:32,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:50:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-02 11:50:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:50:32,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:32,198 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-02 11:50:32,199 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:32,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-02 11:50:32,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:32,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:32,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:32,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:32,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:32,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:32,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:32,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:32,459 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-02 11:50:32,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:32,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:32,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:32,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-02 11:50:32,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:50:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:50:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:50:32,689 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-02 11:50:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:33,384 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-02 11:50:33,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:50:33,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-02 11:50:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:33,386 INFO L225 Difference]: With dead ends: 64 [2018-10-02 11:50:33,386 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:50:33,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:50:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:50:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-02 11:50:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:50:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-02 11:50:33,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-02 11:50:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:33,394 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-02 11:50:33,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:50:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-02 11:50:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:50:33,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:33,395 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-02 11:50:33,396 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:33,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:33,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-02 11:50:33,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:33,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:33,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:33,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:33,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:33,606 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:33,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:50:33,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:33,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:33,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:33,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-02 11:50:33,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:50:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:50:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:50:33,874 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-02 11:50:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:34,099 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-02 11:50:34,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:50:34,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-02 11:50:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:34,100 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:50:34,100 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:50:34,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:50:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:50:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-02 11:50:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:50:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-02 11:50:34,109 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-02 11:50:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:34,110 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-02 11:50:34,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:50:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-02 11:50:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:50:34,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:34,111 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-02 11:50:34,112 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:34,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-02 11:50:34,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:34,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:34,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:34,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:34,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:34,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:34,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:34,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:34,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:35,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:35,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-02 11:50:35,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:50:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:50:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:50:35,102 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-02 11:50:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:35,823 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-02 11:50:35,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:50:35,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-02 11:50:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:35,824 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:50:35,824 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:50:35,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:50:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:50:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-02 11:50:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:50:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-02 11:50:35,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-02 11:50:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:35,834 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-02 11:50:35,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:50:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-02 11:50:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:50:35,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:35,835 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-02 11:50:35,836 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:35,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-02 11:50:35,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:35,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:35,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:35,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:35,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:35,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:35,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:36,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:36,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:36,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:36,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:36,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:36,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-02 11:50:36,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:50:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:50:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:50:36,285 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-02 11:50:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:36,729 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-02 11:50:36,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:50:36,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-02 11:50:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:36,730 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:50:36,730 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:50:36,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:50:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:50:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-02 11:50:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:50:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-02 11:50:36,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-02 11:50:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:36,739 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-02 11:50:36,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:50:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-02 11:50:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:50:36,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:36,741 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-02 11:50:36,741 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:36,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-02 11:50:36,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:36,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:36,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:36,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:36,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:37,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:37,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:37,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:37,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:50:37,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:37,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:37,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:37,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-02 11:50:37,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:50:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:50:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:50:37,574 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-02 11:50:38,290 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-02 11:50:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:40,866 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-02 11:50:40,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:50:40,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-02 11:50:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:40,868 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:50:40,868 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:50:40,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:50:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:50:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-02 11:50:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:50:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-02 11:50:40,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-02 11:50:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:40,879 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-02 11:50:40,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:50:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-02 11:50:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:50:40,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:40,880 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-02 11:50:40,881 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:40,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-02 11:50:40,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:40,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:40,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:40,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:40,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:41,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:41,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:41,208 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:41,231 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:41,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:41,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:41,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:41,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-02 11:50:41,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:50:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:50:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:50:41,603 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-02 11:50:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:42,616 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-02 11:50:42,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:50:42,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-02 11:50:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:42,617 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:50:42,617 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:50:42,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:50:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:50:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-02 11:50:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:50:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-02 11:50:42,631 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-02 11:50:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:42,631 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-02 11:50:42,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:50:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-02 11:50:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:50:42,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:42,632 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-02 11:50:42,633 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:42,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-02 11:50:42,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:42,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:42,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:42,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:42,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:42,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:42,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:50:42,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:42,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:43,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:43,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-02 11:50:43,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:50:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:50:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:50:43,235 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-02 11:50:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:43,838 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-02 11:50:43,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:50:43,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-02 11:50:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:43,839 INFO L225 Difference]: With dead ends: 120 [2018-10-02 11:50:43,839 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:50:43,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:50:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:50:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-02 11:50:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:50:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-02 11:50:43,849 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-02 11:50:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:43,850 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-02 11:50:43,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:50:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-02 11:50:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:50:43,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:43,851 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-02 11:50:43,851 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:43,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-02 11:50:43,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:43,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:43,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:43,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:43,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:44,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:44,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:44,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:44,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:50:44,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:44,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:44,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:44,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-02 11:50:44,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:50:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:50:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:50:44,691 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-02 11:50:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:46,519 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-02 11:50:46,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:50:46,520 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-02 11:50:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:46,521 INFO L225 Difference]: With dead ends: 124 [2018-10-02 11:50:46,521 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:50:46,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:50:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:50:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-02 11:50:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:50:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-02 11:50:46,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-02 11:50:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:46,536 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-02 11:50:46,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:50:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-02 11:50:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:50:46,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:46,538 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-02 11:50:46,538 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:46,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:46,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-02 11:50:46,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:46,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:46,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:46,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:46,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:46,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:46,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:46,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:46,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:47,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:47,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-02 11:50:47,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:50:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:50:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:50:47,013 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-02 11:50:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:47,465 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-02 11:50:47,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:50:47,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-02 11:50:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:47,466 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:50:47,466 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:50:47,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:50:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:50:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-02 11:50:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:50:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-02 11:50:47,477 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-02 11:50:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:47,477 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-02 11:50:47,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:50:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-02 11:50:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:50:47,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:47,479 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-02 11:50:47,479 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:47,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-02 11:50:47,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:47,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:47,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:47,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:47,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:48,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:48,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:48,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:48,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:48,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:48,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:49,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:49,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-02 11:50:49,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:50:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:50:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:50:49,880 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-02 11:50:50,978 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-02 11:50:52,523 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-10-02 11:50:53,071 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-02 11:50:54,044 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-10-02 11:50:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:55,069 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-02 11:50:55,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:50:55,070 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-02 11:50:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:55,071 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:50:55,071 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:50:55,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:50:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:50:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-02 11:50:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:50:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-02 11:50:55,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-02 11:50:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:55,083 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-02 11:50:55,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:50:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-02 11:50:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:50:55,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:55,084 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-02 11:50:55,084 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:55,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-02 11:50:55,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:55,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:55,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:55,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:55,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:55,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:55,578 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 [2018-10-02 11:50:55,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:55,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-02 11:50:55,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:55,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:56,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-02 11:50:56,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:50:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:50:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:50:56,460 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-02 11:51:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:00,854 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-02 11:51:00,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:51:00,854 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-02 11:51:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:00,855 INFO L225 Difference]: With dead ends: 192 [2018-10-02 11:51:00,855 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:51:00,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:51:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:51:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-02 11:51:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:51:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-02 11:51:00,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-02 11:51:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:00,868 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-02 11:51:00,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:51:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-02 11:51:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:51:00,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:00,870 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-02 11:51:00,870 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:00,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-02 11:51:00,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:00,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:00,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:00,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:00,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:01,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:01,435 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 [2018-10-02 11:51:01,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:01,461 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:01,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:01,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:01,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:01,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-02 11:51:01,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:51:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:51:01,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:51:01,877 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-02 11:51:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:04,296 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-02 11:51:04,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:51:04,296 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-02 11:51:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:04,297 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:51:04,297 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:51:04,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:51:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:51:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-02 11:51:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:51:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-02 11:51:04,310 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-02 11:51:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:04,311 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-02 11:51:04,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:51:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-02 11:51:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:51:04,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:04,311 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-02 11:51:04,312 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:04,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-02 11:51:04,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:04,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:04,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:04,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:04,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:04,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:04,794 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 [2018-10-02 11:51:04,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:04,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:51:04,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:04,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:05,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:05,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-02 11:51:05,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:51:05,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:51:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:51:05,178 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-02 11:51:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:05,694 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-02 11:51:05,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:51:05,695 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-02 11:51:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:05,696 INFO L225 Difference]: With dead ends: 180 [2018-10-02 11:51:05,696 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:51:05,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:51:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:51:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-02 11:51:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:51:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-02 11:51:05,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-02 11:51:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:05,707 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-02 11:51:05,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:51:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-02 11:51:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:51:05,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:05,707 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-02 11:51:05,708 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:05,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-02 11:51:05,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:05,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:05,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:05,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:05,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:06,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:06,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:06,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:06,285 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:51:06,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:06,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:06,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:06,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-02 11:51:06,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:51:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:51:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:51:06,760 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-02 11:51:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:09,643 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-02 11:51:09,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:51:09,646 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-02 11:51:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:09,647 INFO L225 Difference]: With dead ends: 184 [2018-10-02 11:51:09,648 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 11:51:09,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:51:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 11:51:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-02 11:51:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:51:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-02 11:51:09,664 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-02 11:51:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:09,664 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-02 11:51:09,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:51:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-02 11:51:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:51:09,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:09,666 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-02 11:51:09,666 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:09,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-02 11:51:09,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:09,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:09,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:09,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:09,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:10,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:10,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:10,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:10,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:10,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:10,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-02 11:51:10,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:51:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:51:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:51:10,578 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-02 11:51:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:11,183 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-02 11:51:11,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:51:11,185 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-02 11:51:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:11,186 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:51:11,186 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:51:11,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:51:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:51:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-02 11:51:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:51:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-02 11:51:11,198 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-02 11:51:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:11,199 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-02 11:51:11,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:51:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-02 11:51:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:51:11,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:11,200 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-02 11:51:11,200 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:11,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-02 11:51:11,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:11,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:11,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:11,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:11,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:11,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:11,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:11,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:11,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:11,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:11,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:13,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:13,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-02 11:51:13,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:51:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:51:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:51:13,074 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-02 11:51:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:19,527 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-02 11:51:19,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:51:19,527 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-02 11:51:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:19,529 INFO L225 Difference]: With dead ends: 249 [2018-10-02 11:51:19,529 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 11:51:19,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-10-02 11:51:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 11:51:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-02 11:51:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:51:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-02 11:51:19,546 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-02 11:51:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:19,546 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-02 11:51:19,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:51:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-02 11:51:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:51:19,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:19,547 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-02 11:51:19,548 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:19,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-02 11:51:19,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:19,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:19,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:19,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:19,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:20,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:20,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:20,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:20,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:51:20,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:20,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:21,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:21,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-02 11:51:21,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:51:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:51:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:51:21,179 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-02 11:51:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:24,491 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-02 11:51:24,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:51:24,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-02 11:51:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:24,493 INFO L225 Difference]: With dead ends: 214 [2018-10-02 11:51:24,493 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 11:51:24,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:51:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 11:51:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-02 11:51:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:51:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-02 11:51:24,508 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-02 11:51:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:24,508 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-02 11:51:24,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:51:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-02 11:51:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:51:24,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:24,509 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-02 11:51:24,509 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:24,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-02 11:51:24,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:24,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:24,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:25,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:25,215 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 [2018-10-02 11:51:25,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:25,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:25,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:25,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:25,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:25,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-02 11:51:25,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:51:25,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:51:25,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:51:25,702 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-02 11:51:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:26,473 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-02 11:51:26,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:51:26,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-02 11:51:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:26,474 INFO L225 Difference]: With dead ends: 225 [2018-10-02 11:51:26,474 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:51:26,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:51:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:51:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-02 11:51:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:51:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-02 11:51:26,489 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-02 11:51:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:26,489 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-02 11:51:26,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:51:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-02 11:51:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:51:26,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:26,490 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-02 11:51:26,490 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:26,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-02 11:51:26,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:26,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:26,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:27,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:27,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:27,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:27,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:51:27,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:27,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:28,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:28,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-02 11:51:28,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:51:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:51:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:51:28,049 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-02 11:51:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:32,107 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-02 11:51:32,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:51:32,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-02 11:51:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:32,115 INFO L225 Difference]: With dead ends: 229 [2018-10-02 11:51:32,115 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:51:32,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:51:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:51:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-02 11:51:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:51:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-02 11:51:32,138 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-02 11:51:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:32,138 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-02 11:51:32,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:51:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-02 11:51:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:51:32,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:32,139 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-02 11:51:32,140 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:32,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-02 11:51:32,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:32,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:32,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:32,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:32,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:32,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:32,575 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 [2018-10-02 11:51:32,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:32,611 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:51:32,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:32,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:33,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:33,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-02 11:51:33,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:51:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:51:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:51:33,102 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-02 11:51:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:34,655 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-02 11:51:34,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:51:34,656 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-02 11:51:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:34,657 INFO L225 Difference]: With dead ends: 240 [2018-10-02 11:51:34,657 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:51:34,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:51:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:51:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-02 11:51:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:51:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-02 11:51:34,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-02 11:51:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:34,676 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-02 11:51:34,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:51:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-02 11:51:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:51:34,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:34,677 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-02 11:51:34,677 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:34,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-02 11:51:34,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:34,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:34,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:35,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:35,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:35,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:35,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:36,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:36,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-02 11:51:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:51:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:51:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:51:36,641 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-02 11:51:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:40,980 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-02 11:51:40,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:51:40,980 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-02 11:51:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:40,982 INFO L225 Difference]: With dead ends: 244 [2018-10-02 11:51:40,982 INFO L226 Difference]: Without dead ends: 182 [2018-10-02 11:51:40,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:51:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-02 11:51:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-02 11:51:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:51:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-02 11:51:41,004 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-02 11:51:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:41,004 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-02 11:51:41,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:51:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-02 11:51:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:51:41,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:41,005 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-02 11:51:41,005 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:41,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-02 11:51:41,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:41,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:41,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:41,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:41,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:41,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:41,578 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 [2018-10-02 11:51:41,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:41,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:41,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:41,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:42,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:42,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-02 11:51:42,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:51:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:51:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:51:42,134 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-02 11:51:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:43,232 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-02 11:51:43,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:51:43,234 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-02 11:51:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:43,235 INFO L225 Difference]: With dead ends: 255 [2018-10-02 11:51:43,235 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 11:51:43,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:51:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 11:51:43,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-02 11:51:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 11:51:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-02 11:51:43,253 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-02 11:51:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:43,254 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-02 11:51:43,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:51:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-02 11:51:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 11:51:43,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:43,254 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-02 11:51:43,255 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:43,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-02 11:51:43,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:43,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:43,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:44,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:44,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:51:44,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:44,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:51:44,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:44,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:46,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:46,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-02 11:51:46,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:51:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:51:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:51:46,919 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-02 11:51:55,574 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2018-10-02 11:51:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:57,120 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-02 11:51:57,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-02 11:51:57,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-02 11:51:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:57,122 INFO L225 Difference]: With dead ends: 325 [2018-10-02 11:51:57,122 INFO L226 Difference]: Without dead ends: 190 [2018-10-02 11:51:57,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-10-02 11:51:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-02 11:51:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-02 11:51:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:51:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-02 11:51:57,143 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-02 11:51:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:57,143 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-02 11:51:57,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:51:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-02 11:51:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:51:57,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:57,144 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-02 11:51:57,144 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:57,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-02 11:51:57,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:57,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:57,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:57,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:57,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:58,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:58,115 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 [2018-10-02 11:51:58,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:58,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:58,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:58,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:59,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:59,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-02 11:51:59,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:51:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:51:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:51:59,081 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-02 11:52:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:04,990 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-02 11:52:04,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:52:04,991 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-02 11:52:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:04,993 INFO L225 Difference]: With dead ends: 274 [2018-10-02 11:52:04,993 INFO L226 Difference]: Without dead ends: 204 [2018-10-02 11:52:04,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=641, Invalid=8289, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:52:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-02 11:52:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-02 11:52:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:52:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-02 11:52:05,020 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-02 11:52:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:05,021 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-02 11:52:05,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:52:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-02 11:52:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:52:05,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:05,022 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-02 11:52:05,022 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:05,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-02 11:52:05,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:05,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:05,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:05,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:06,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:06,128 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 [2018-10-02 11:52:06,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:06,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:52:06,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:06,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:06,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:06,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-02 11:52:06,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:52:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:52:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:52:06,853 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-02 11:52:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:07,906 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-02 11:52:07,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:52:07,907 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-02 11:52:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:07,909 INFO L225 Difference]: With dead ends: 285 [2018-10-02 11:52:07,909 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 11:52:07,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:52:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 11:52:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-02 11:52:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 11:52:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-02 11:52:07,932 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-02 11:52:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:07,933 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-02 11:52:07,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:52:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-02 11:52:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 11:52:07,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:07,933 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-02 11:52:07,934 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:07,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-02 11:52:07,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:07,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:07,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:07,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:07,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:09,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:09,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:52:09,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:09,242 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 11:52:09,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:09,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:12,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:12,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-02 11:52:12,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:52:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:52:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:52:12,333 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-02 11:52:21,330 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-02 11:52:21,586 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-02 11:52:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:23,771 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-02 11:52:23,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-02 11:52:23,771 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-02 11:52:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:23,773 INFO L225 Difference]: With dead ends: 363 [2018-10-02 11:52:23,773 INFO L226 Difference]: Without dead ends: 212 [2018-10-02 11:52:23,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2679, Invalid=35933, Unknown=0, NotChecked=0, Total=38612 [2018-10-02 11:52:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-02 11:52:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-02 11:52:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:52:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-02 11:52:23,805 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-02 11:52:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:23,805 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-02 11:52:23,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:52:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-02 11:52:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:52:23,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:23,806 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-02 11:52:23,806 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:23,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-02 11:52:23,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:23,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:23,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:23,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:23,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:26,021 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 [2018-10-02 11:52:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:26,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:27,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:27,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-02 11:52:27,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:52:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:52:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:52:27,421 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-02 11:52:32,506 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-02 11:52:32,780 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-02 11:52:33,040 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-02 11:52:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:34,862 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-02 11:52:34,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:52:34,862 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-02 11:52:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:34,863 INFO L225 Difference]: With dead ends: 304 [2018-10-02 11:52:34,863 INFO L226 Difference]: Without dead ends: 226 [2018-10-02 11:52:34,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:52:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-02 11:52:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-02 11:52:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:52:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-02 11:52:34,888 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-02 11:52:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:34,888 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-02 11:52:34,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:52:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-02 11:52:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:52:34,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:34,889 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-02 11:52:34,889 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:34,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-02 11:52:34,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:34,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:35,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:35,684 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 [2018-10-02 11:52:35,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:35,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:35,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:35,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:36,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:36,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-02 11:52:36,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:52:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:52:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:52:36,841 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-02 11:52:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:38,183 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-02 11:52:38,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:52:38,183 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-02 11:52:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:38,185 INFO L225 Difference]: With dead ends: 315 [2018-10-02 11:52:38,185 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 11:52:38,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:52:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 11:52:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-02 11:52:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-02 11:52:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-02 11:52:38,219 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-02 11:52:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:38,219 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-02 11:52:38,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:52:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-02 11:52:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 11:52:38,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:38,220 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-02 11:52:38,221 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:38,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-02 11:52:38,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:38,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:38,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:38,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:38,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:39,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:39,763 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 [2018-10-02 11:52:39,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:39,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:52:39,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:39,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:42,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:42,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-02 11:52:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:52:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:52:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:52:42,939 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-02 11:52:53,653 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-02 11:52:53,919 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-02 11:52:54,188 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-02 11:52:54,420 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:52:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:56,723 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-02 11:52:56,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-02 11:52:56,723 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-02 11:52:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:56,725 INFO L225 Difference]: With dead ends: 401 [2018-10-02 11:52:56,725 INFO L226 Difference]: Without dead ends: 234 [2018-10-02 11:52:56,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-10-02 11:52:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-02 11:52:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-02 11:52:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:52:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-02 11:52:56,763 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-02 11:52:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:56,763 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-02 11:52:56,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:52:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-02 11:52:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 11:52:56,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:56,764 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-02 11:52:56,764 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:56,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-02 11:52:56,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:56,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:56,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:56,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:56,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:58,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:58,287 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 [2018-10-02 11:52:58,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:58,321 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:58,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:58,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:59,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:59,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-02 11:52:59,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:52:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:52:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:52:59,661 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-02 11:53:04,750 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-02 11:53:05,077 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-02 11:53:05,388 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-02 11:53:05,593 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-02 11:53:05,794 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:53:05,990 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-02 11:53:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,037 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-02 11:53:08,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:53:08,037 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-02 11:53:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,039 INFO L225 Difference]: With dead ends: 334 [2018-10-02 11:53:08,039 INFO L226 Difference]: Without dead ends: 248 [2018-10-02 11:53:08,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=869, Invalid=12241, Unknown=0, NotChecked=0, Total=13110 [2018-10-02 11:53:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-02 11:53:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-02 11:53:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 11:53:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-02 11:53:08,075 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-02 11:53:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,075 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-02 11:53:08,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:53:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-02 11:53:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 11:53:08,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,076 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-02 11:53:08,076 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-02 11:53:08,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:08,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:09,359 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 [2018-10-02 11:53:09,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:09,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-02 11:53:09,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:09,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:11,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-02 11:53:11,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:53:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:53:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:53:11,415 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-02 11:53:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,292 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-02 11:53:13,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:13,293 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-02 11:53:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,294 INFO L225 Difference]: With dead ends: 345 [2018-10-02 11:53:13,294 INFO L226 Difference]: Without dead ends: 166 [2018-10-02 11:53:13,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:53:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-02 11:53:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-02 11:53:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-02 11:53:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-02 11:53:13,335 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-02 11:53:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,336 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-02 11:53:13,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:53:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-02 11:53:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-02 11:53:13,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,337 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-02 11:53:13,337 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-02 11:53:13,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:15,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:15,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:15,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-02 11:53:15,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:15,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:17,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:17,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-02 11:53:17,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:53:17,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:53:17,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:53:17,195 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-02 11:53:24,130 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-02 11:53:24,473 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-02 11:53:24,796 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-02 11:53:25,020 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-02 11:53:25,226 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-02 11:53:25,420 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:53:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:27,497 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-02 11:53:27,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:53:27,497 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-02 11:53:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:27,499 INFO L225 Difference]: With dead ends: 349 [2018-10-02 11:53:27,499 INFO L226 Difference]: Without dead ends: 259 [2018-10-02 11:53:27,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:53:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-02 11:53:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-02 11:53:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-02 11:53:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-02 11:53:27,531 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-02 11:53:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:27,532 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-02 11:53:27,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:53:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-02 11:53:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-02 11:53:27,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:27,532 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-02 11:53:27,533 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:27,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-02 11:53:27,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:27,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:27,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:27,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:28,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:28,561 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 [2018-10-02 11:53:28,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:28,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:29,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:29,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-02 11:53:29,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:53:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:53:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:53:29,911 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-02 11:53:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:31,654 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-02 11:53:31,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:53:31,654 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-02 11:53:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:31,656 INFO L225 Difference]: With dead ends: 360 [2018-10-02 11:53:31,656 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:53:31,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:53:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:53:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-02 11:53:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:53:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-02 11:53:31,687 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-02 11:53:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:31,687 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-02 11:53:31,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:53:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-02 11:53:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:53:31,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:31,688 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-02 11:53:31,688 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:31,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-02 11:53:31,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:31,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:31,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:31,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:33,507 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 [2018-10-02 11:53:33,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:33,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:33,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:33,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:35,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:35,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-02 11:53:35,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:53:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:53:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:53:35,181 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-02 11:53:41,774 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-02 11:53:42,133 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-02 11:53:42,479 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-02 11:53:42,718 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-02 11:53:42,950 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-02 11:53:43,216 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-02 11:53:43,421 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:53:43,625 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-02 11:53:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:45,577 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-02 11:53:45,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:53:45,577 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-02 11:53:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:45,579 INFO L225 Difference]: With dead ends: 364 [2018-10-02 11:53:45,579 INFO L226 Difference]: Without dead ends: 270 [2018-10-02 11:53:45,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=995, Invalid=14505, Unknown=0, NotChecked=0, Total=15500 [2018-10-02 11:53:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-02 11:53:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-02 11:53:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:53:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-02 11:53:45,613 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-02 11:53:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:45,613 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-02 11:53:45,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:53:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-02 11:53:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:53:45,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:45,614 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-02 11:53:45,614 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:45,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-02 11:53:45,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:45,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:45,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,534 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 [2018-10-02 11:53:47,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:47,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-02 11:53:47,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:47,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:48,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-02 11:53:48,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:53:48,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:53:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:53:48,981 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-02 11:53:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:50,824 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-02 11:53:50,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:53:50,824 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-02 11:53:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:50,826 INFO L225 Difference]: With dead ends: 375 [2018-10-02 11:53:50,826 INFO L226 Difference]: Without dead ends: 180 [2018-10-02 11:53:50,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:53:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-02 11:53:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-02 11:53:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-02 11:53:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-02 11:53:50,857 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-02 11:53:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:50,858 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-02 11:53:50,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:53:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-02 11:53:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-02 11:53:50,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:50,859 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-02 11:53:50,859 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:50,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-02 11:53:50,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:50,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:50,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:50,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:52,553 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 [2018-10-02 11:53:52,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:52,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:52,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:52,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-02 11:53:54,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:53:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:53:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:53:54,520 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-02 11:54:01,410 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-02 11:54:01,796 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-02 11:54:02,156 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-02 11:54:02,399 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-02 11:54:02,636 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-02 11:54:02,859 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-02 11:54:03,071 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-02 11:54:03,275 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:54:03,513 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-02 11:54:03,764 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-10-02 11:54:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,602 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-02 11:54:05,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:54:05,602 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-02 11:54:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,604 INFO L225 Difference]: With dead ends: 379 [2018-10-02 11:54:05,604 INFO L226 Difference]: Without dead ends: 281 [2018-10-02 11:54:05,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:54:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-02 11:54:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-02 11:54:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-02 11:54:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-02 11:54:05,648 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-02 11:54:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,649 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-02 11:54:05,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:54:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-02 11:54:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-02 11:54:05,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,649 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-02 11:54:05,650 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-02 11:54:05,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:06,773 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 [2018-10-02 11:54:06,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:06,830 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-02 11:54:06,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:06,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:08,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-02 11:54:08,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:54:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:54:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:54:08,068 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-02 11:54:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,280 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-02 11:54:10,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:54:10,280 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-02 11:54:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,282 INFO L225 Difference]: With dead ends: 390 [2018-10-02 11:54:10,282 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:54:10,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:54:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:54:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-02 11:54:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 11:54:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-02 11:54:10,333 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-02 11:54:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,334 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-02 11:54:10,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:54:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-02 11:54:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-02 11:54:10,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,335 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-02 11:54:10,335 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-02 11:54:10,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:10,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:12,562 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 [2018-10-02 11:54:12,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:12,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-02 11:54:12,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:12,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:14,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-02 11:54:14,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:54:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:54:14,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:54:14,845 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-02 11:54:22,162 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-02 11:54:22,563 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-02 11:54:22,936 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-02 11:54:23,204 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-10-02 11:54:23,453 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-02 11:54:23,692 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-02 11:54:23,961 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-02 11:54:24,243 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-02 11:54:24,458 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-02 11:54:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,715 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-02 11:54:26,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 11:54:26,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-02 11:54:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,716 INFO L225 Difference]: With dead ends: 394 [2018-10-02 11:54:26,717 INFO L226 Difference]: Without dead ends: 292 [2018-10-02 11:54:26,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-10-02 11:54:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-02 11:54:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-02 11:54:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 11:54:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-02 11:54:26,756 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-02 11:54:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,756 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-02 11:54:26,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:54:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-02 11:54:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:54:26,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,757 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-02 11:54:26,757 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-02 11:54:26,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:26,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:28,613 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 [2018-10-02 11:54:28,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:30,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-02 11:54:30,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:54:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:54:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:54:30,168 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. Received shutdown request... [2018-10-02 11:54:31,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:54:31,758 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:54:31,765 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:54:31,765 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:54:31 BoogieIcfgContainer [2018-10-02 11:54:31,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:54:31,767 INFO L168 Benchmark]: Toolchain (without parser) took 245853.93 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 956.4 MB in the end (delta: 488.8 MB). Peak memory consumption was 364.6 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:31,767 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:54:31,768 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:54:31,768 INFO L168 Benchmark]: Boogie Preprocessor took 22.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:54:31,768 INFO L168 Benchmark]: RCFGBuilder took 332.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:31,769 INFO L168 Benchmark]: TraceAbstraction took 245451.81 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 956.4 MB in the end (delta: 467.7 MB). Peak memory consumption was 343.4 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:31,771 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 332.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245451.81 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 956.4 MB in the end (delta: 467.7 MB). Peak memory consumption was 343.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (189states) and FLOYD_HOARE automaton (currently 48 states, 83 states before enhancement), while ReachableStatesComputation was computing reachable states (231 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 245.3s OverallTime, 47 OverallIterations, 27 TraceHistogramMax, 162.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 839 SDtfs, 4007 SDslu, 22613 SDs, 0 SdLazy, 110288 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7059 GetRequests, 3621 SyntacticMatches, 18 SemanticMatches, 3420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72255 ImplicationChecksByTransitivity, 157.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=46, 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: 0.8s AutomataMinimizationTime, 46 MinimizatonAttempts, 1375 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 77.9s InterpolantComputationTime, 8814 NumberOfCodeBlocks, 8712 NumberOfCodeBlocksAsserted, 402 NumberOfCheckSat, 8723 ConstructedInterpolants, 0 QuantifiedInterpolants, 8209326 SizeOfPredicates, 140 NumberOfNonLiveVariables, 6387 ConjunctsInSsa, 1892 ConjunctsInUnsatCore, 91 InterpolantComputations, 3 PerfectInterpolantSequences, 22541/74298 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/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-54-31-781.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-54-31-781.csv Completed graceful shutdown